diff --git a/.github/ISSUE_TEMPLATE/bug_report.md b/.github/ISSUE_TEMPLATE/bug_report.md
index 823014a..d872271 100644
--- a/.github/ISSUE_TEMPLATE/bug_report.md
+++ b/.github/ISSUE_TEMPLATE/bug_report.md
@@ -26,9 +26,12 @@ If applicable, add screenshots to help explain your problem.
 **Desktop (please complete the following information):**
  - OS: [e.g. Ubuntu] and its version
  - Desktop environment [e.g. GNOME] and its version
- - Sound Switcher Indicator version [e.g. 2.3.8]
+ - Sound Switcher Indicator version [e.g. 2.3.9]
  - Installation source: `snap`, `.deb`, PPA, source code etc.
 
+**Indicator config:**
+Attach the file `~/.config/indicator-sound-switcher.json`
+
 **Indicator log:**
 In order to fetch it, quit the indicator from the menu ("Quit"), open Terminal and start it again as follows: 
 ```bash
diff --git a/.gitignore b/.gitignore
index 2c3ec1b..0c78f41 100644
--- a/.gitignore
+++ b/.gitignore
@@ -2,6 +2,7 @@
 /dist/
 /locale/
 /.idea/
+/venv/
 MANIFEST
 *.pyc
 *.mo
diff --git a/debian/changelog b/debian/changelog
index e0a8b77..7299eb7 100644
--- a/debian/changelog
+++ b/debian/changelog
@@ -1,3 +1,9 @@
+indicator-sound-switcher (2.3.9-1) jammy; urgency=low
+
+  * Configuration prune button in Preferences (#120)
+
+ -- Dmitry Kann <yktooo@gmail.com>  Tue, 28 Jun 2022 11:28:02 +0200
+
 indicator-sound-switcher (2.3.8-1) jammy; urgency=low
 
   * Only consider available ports for shortcut switching (#118)
diff --git a/doc/i18n.md b/doc/i18n.md
index 76a4b0a..a1cc625 100644
--- a/doc/i18n.md
+++ b/doc/i18n.md
@@ -10,6 +10,6 @@ find . -name '*.py' -or -name '*.glade' | xargs xgettext --from-code=UTF-8 --out
 
 1. `sudo apt-get install poedit`
 2. Open the `po/<language>.po` file with Poeditor
-3. Select in Poeditor: Catalogue -> Update from POT file… -> Select the file `po/indicator-sound-switcher.pot`
+3. Select in Poeditor: Translation -> Update from POT file… -> Select the file `po/indicator-sound-switcher.pot`
 4. Edit and save the translation
 5. Commit the file and send a pull request to the author
diff --git a/lib/indicator_sound_switcher/prefs.glade b/lib/indicator_sound_switcher/prefs.glade
index 68dd0cb..ba663cc 100644
--- a/lib/indicator_sound_switcher/prefs.glade
+++ b/lib/indicator_sound_switcher/prefs.glade
@@ -1,5 +1,5 @@
 <?xml version="1.0" encoding="UTF-8"?>
-<!-- Generated with glade 3.22.1 
+<!-- Generated with glade 3.38.2 
 
 Copyright (C)
 
@@ -35,46 +35,22 @@ Author: Dmitry Kann
     </columns>
   </object>
   <object class="GtkDialog" id="prefs_dialog">
-    <property name="can_focus">False</property>
-    <property name="window_position">center</property>
-    <property name="default_width">800</property>
-    <property name="default_height">500</property>
-    <property name="icon_name">gtk-preferences</property>
-    <property name="type_hint">normal</property>
+    <property name="can-focus">False</property>
+    <property name="window-position">center</property>
+    <property name="default-width">800</property>
+    <property name="default-height">500</property>
+    <property name="icon-name">gtk-preferences</property>
+    <property name="type-hint">normal</property>
     <signal name="destroy" handler="on_destroy" swapped="no"/>
-    <child type="titlebar">
-      <object class="GtkHeaderBar">
-        <property name="visible">True</property>
-        <property name="can_focus">False</property>
-        <property name="title" translatable="yes">Preferences</property>
-        <property name="subtitle" translatable="yes">Sound Switcher Indicator</property>
-        <property name="show_close_button">True</property>
-        <property name="decoration_layout">close,maximize</property>
-        <child>
-          <object class="GtkButton">
-            <property name="label">gtk-refresh</property>
-            <property name="visible">True</property>
-            <property name="can_focus">True</property>
-            <property name="receives_default">True</property>
-            <property name="use_stock">True</property>
-            <property name="always_show_image">True</property>
-            <signal name="clicked" handler="on_refresh" swapped="no"/>
-          </object>
-          <packing>
-            <property name="pack_type">end</property>
-          </packing>
-        </child>
-      </object>
-    </child>
     <child internal-child="vbox">
       <object class="GtkBox">
-        <property name="can_focus">False</property>
+        <property name="can-focus">False</property>
         <property name="orientation">vertical</property>
         <property name="spacing">2</property>
         <child internal-child="action_area">
           <object class="GtkButtonBox">
-            <property name="can_focus">False</property>
-            <property name="layout_style">end</property>
+            <property name="can-focus">False</property>
+            <property name="layout-style">end</property>
             <child>
               <placeholder/>
             </child>
@@ -88,73 +64,109 @@ Author: Dmitry Kann
         <child>
           <object class="GtkNotebook">
             <property name="visible">True</property>
-            <property name="can_focus">True</property>
+            <property name="can-focus">True</property>
             <property name="hexpand">True</property>
             <property name="vexpand">True</property>
-            <property name="show_border">False</property>
+            <property name="show-border">False</property>
             <child>
-              <object class="GtkGrid">
+              <object class="GtkBox">
                 <property name="visible">True</property>
-                <property name="can_focus">False</property>
-                <property name="margin_left">12</property>
-                <property name="margin_right">12</property>
-                <property name="margin_top">12</property>
-                <property name="margin_bottom">12</property>
-                <property name="row_spacing">6</property>
-                <property name="column_spacing">6</property>
-                <property name="column_homogeneous">True</property>
+                <property name="can-focus">False</property>
+                <property name="orientation">vertical</property>
                 <child>
-                  <object class="GtkLabel">
+                  <!-- n-columns=2 n-rows=2 -->
+                  <object class="GtkGrid">
                     <property name="visible">True</property>
-                    <property name="can_focus">False</property>
-                    <property name="halign">start</property>
-                    <property name="label" translatable="yes">Show inputs</property>
-                    <attributes>
-                      <attribute name="weight" value="bold"/>
-                    </attributes>
-                  </object>
-                  <packing>
-                    <property name="left_attach">0</property>
-                    <property name="top_attach">0</property>
-                  </packing>
-                </child>
-                <child>
-                  <object class="GtkLabel">
-                    <property name="visible">True</property>
-                    <property name="can_focus">False</property>
-                    <property name="halign">start</property>
-                    <property name="label" translatable="yes">Show outputs</property>
-                    <attributes>
-                      <attribute name="weight" value="bold"/>
-                    </attributes>
-                  </object>
-                  <packing>
-                    <property name="left_attach">0</property>
-                    <property name="top_attach">1</property>
-                  </packing>
-                </child>
-                <child>
-                  <object class="GtkSwitch" id="sw_show_outputs">
-                    <property name="visible">True</property>
-                    <property name="can_focus">True</property>
-                    <property name="halign">end</property>
-                    <signal name="state-set" handler="on_show_outputs_switched" swapped="no"/>
+                    <property name="can-focus">False</property>
+                    <property name="border-width">12</property>
+                    <property name="row-spacing">6</property>
+                    <property name="column-spacing">6</property>
+                    <property name="column-homogeneous">True</property>
+                    <child>
+                      <object class="GtkLabel">
+                        <property name="visible">True</property>
+                        <property name="can-focus">False</property>
+                        <property name="halign">start</property>
+                        <property name="label" translatable="yes">Show inputs</property>
+                        <attributes>
+                          <attribute name="weight" value="bold"/>
+                        </attributes>
+                      </object>
+                      <packing>
+                        <property name="left-attach">0</property>
+                        <property name="top-attach">0</property>
+                      </packing>
+                    </child>
+                    <child>
+                      <object class="GtkLabel">
+                        <property name="visible">True</property>
+                        <property name="can-focus">False</property>
+                        <property name="halign">start</property>
+                        <property name="label" translatable="yes">Show outputs</property>
+                        <attributes>
+                          <attribute name="weight" value="bold"/>
+                        </attributes>
+                      </object>
+                      <packing>
+                        <property name="left-attach">0</property>
+                        <property name="top-attach">1</property>
+                      </packing>
+                    </child>
+                    <child>
+                      <object class="GtkSwitch" id="sw_show_outputs">
+                        <property name="visible">True</property>
+                        <property name="can-focus">True</property>
+                        <property name="halign">end</property>
+                        <signal name="state-set" handler="on_show_outputs_switched" swapped="no"/>
+                      </object>
+                      <packing>
+                        <property name="left-attach">1</property>
+                        <property name="top-attach">1</property>
+                      </packing>
+                    </child>
+                    <child>
+                      <object class="GtkSwitch" id="sw_show_inputs">
+                        <property name="visible">True</property>
+                        <property name="can-focus">True</property>
+                        <property name="halign">end</property>
+                        <signal name="state-set" handler="on_show_inputs_switched" swapped="no"/>
+                      </object>
+                      <packing>
+                        <property name="left-attach">1</property>
+                        <property name="top-attach">0</property>
+                      </packing>
+                    </child>
                   </object>
                   <packing>
-                    <property name="left_attach">1</property>
-                    <property name="top_attach">1</property>
+                    <property name="expand">True</property>
+                    <property name="fill">True</property>
+                    <property name="position">0</property>
                   </packing>
                 </child>
                 <child>
-                  <object class="GtkSwitch" id="sw_show_inputs">
+                  <object class="GtkBox">
                     <property name="visible">True</property>
-                    <property name="can_focus">True</property>
-                    <property name="halign">end</property>
-                    <signal name="state-set" handler="on_show_inputs_switched" swapped="no"/>
+                    <property name="can-focus">False</property>
+                    <property name="border-width">12</property>
+                    <child>
+                      <object class="GtkButton" id="b_config_prune">
+                        <property name="label" translatable="yes">Prune configuration…</property>
+                        <property name="visible">True</property>
+                        <property name="can-focus">True</property>
+                        <property name="receives-default">True</property>
+                        <signal name="clicked" handler="on_config_prune" swapped="no"/>
+                      </object>
+                      <packing>
+                        <property name="expand">False</property>
+                        <property name="fill">True</property>
+                        <property name="position">0</property>
+                      </packing>
+                    </child>
                   </object>
                   <packing>
-                    <property name="left_attach">1</property>
-                    <property name="top_attach">0</property>
+                    <property name="expand">False</property>
+                    <property name="fill">True</property>
+                    <property name="position">1</property>
                   </packing>
                 </child>
               </object>
@@ -162,30 +174,31 @@ Author: Dmitry Kann
             <child type="tab">
               <object class="GtkLabel">
                 <property name="visible">True</property>
-                <property name="can_focus">False</property>
+                <property name="can-focus">False</property>
                 <property name="label" translatable="yes">_General</property>
-                <property name="use_underline">True</property>
+                <property name="use-underline">True</property>
               </object>
               <packing>
-                <property name="tab_fill">False</property>
+                <property name="tab-fill">False</property>
               </packing>
             </child>
             <child>
+              <!-- n-columns=3 n-rows=2 -->
               <object class="GtkGrid">
                 <property name="visible">True</property>
-                <property name="can_focus">False</property>
-                <property name="margin_left">12</property>
-                <property name="margin_right">12</property>
-                <property name="margin_top">12</property>
-                <property name="margin_bottom">12</property>
+                <property name="can-focus">False</property>
+                <property name="margin-left">12</property>
+                <property name="margin-right">12</property>
+                <property name="margin-top">12</property>
+                <property name="margin-bottom">12</property>
                 <property name="hexpand">True</property>
                 <property name="vexpand">True</property>
-                <property name="row_spacing">6</property>
-                <property name="column_spacing">12</property>
+                <property name="row-spacing">6</property>
+                <property name="column-spacing">12</property>
                 <child>
                   <object class="GtkLabel">
                     <property name="visible">True</property>
-                    <property name="can_focus">False</property>
+                    <property name="can-focus">False</property>
                     <property name="label" translatable="yes">Devices</property>
                     <property name="justify">center</property>
                     <attributes>
@@ -193,14 +206,14 @@ Author: Dmitry Kann
                     </attributes>
                   </object>
                   <packing>
-                    <property name="left_attach">0</property>
-                    <property name="top_attach">0</property>
+                    <property name="left-attach">0</property>
+                    <property name="top-attach">0</property>
                   </packing>
                 </child>
                 <child>
                   <object class="GtkLabel">
                     <property name="visible">True</property>
-                    <property name="can_focus">False</property>
+                    <property name="can-focus">False</property>
                     <property name="label" translatable="yes">Device settings</property>
                     <property name="xalign">0</property>
                     <attributes>
@@ -208,14 +221,14 @@ Author: Dmitry Kann
                     </attributes>
                   </object>
                   <packing>
-                    <property name="left_attach">1</property>
-                    <property name="top_attach">0</property>
+                    <property name="left-attach">1</property>
+                    <property name="top-attach">0</property>
                   </packing>
                 </child>
                 <child>
                   <object class="GtkLabel">
                     <property name="visible">True</property>
-                    <property name="can_focus">False</property>
+                    <property name="can-focus">False</property>
                     <property name="label" translatable="yes">Port settings</property>
                     <property name="xalign">0</property>
                     <attributes>
@@ -223,28 +236,28 @@ Author: Dmitry Kann
                     </attributes>
                   </object>
                   <packing>
-                    <property name="left_attach">2</property>
-                    <property name="top_attach">0</property>
+                    <property name="left-attach">2</property>
+                    <property name="top-attach">0</property>
                   </packing>
                 </child>
                 <child>
                   <object class="GtkScrolledWindow">
                     <property name="visible">True</property>
-                    <property name="can_focus">True</property>
+                    <property name="can-focus">True</property>
                     <property name="hexpand">True</property>
                     <property name="vexpand">True</property>
-                    <property name="shadow_type">in</property>
-                    <property name="min_content_width">200</property>
+                    <property name="shadow-type">in</property>
+                    <property name="min-content-width">200</property>
                     <child>
                       <object class="GtkViewport">
                         <property name="visible">True</property>
-                        <property name="can_focus">False</property>
+                        <property name="can-focus">False</property>
                         <property name="hexpand">True</property>
                         <property name="vexpand">True</property>
                         <child>
                           <object class="GtkListBox" id="lbx_devices">
                             <property name="visible">True</property>
-                            <property name="can_focus">False</property>
+                            <property name="can-focus">False</property>
                             <property name="hexpand">True</property>
                             <property name="vexpand">True</property>
                             <signal name="row-selected" handler="on_device_row_selected" swapped="no"/>
@@ -254,14 +267,14 @@ Author: Dmitry Kann
                     </child>
                   </object>
                   <packing>
-                    <property name="left_attach">0</property>
-                    <property name="top_attach">1</property>
+                    <property name="left-attach">0</property>
+                    <property name="top-attach">1</property>
                   </packing>
                 </child>
                 <child>
                   <object class="GtkBox" id="bx_dev_props">
                     <property name="visible">True</property>
-                    <property name="can_focus">False</property>
+                    <property name="can-focus">False</property>
                     <property name="hexpand">True</property>
                     <property name="vexpand">True</property>
                     <property name="orientation">vertical</property>
@@ -269,12 +282,12 @@ Author: Dmitry Kann
                     <child>
                       <object class="GtkBox">
                         <property name="visible">True</property>
-                        <property name="can_focus">False</property>
+                        <property name="can-focus">False</property>
                         <property name="spacing">6</property>
                         <child>
                           <object class="GtkLabel">
                             <property name="visible">True</property>
-                            <property name="can_focus">False</property>
+                            <property name="can-focus">False</property>
                             <property name="label" translatable="yes">Custom name:</property>
                           </object>
                           <packing>
@@ -286,9 +299,9 @@ Author: Dmitry Kann
                         <child>
                           <object class="GtkEntry" id="e_device_name">
                             <property name="visible">True</property>
-                            <property name="can_focus">True</property>
-                            <property name="secondary_icon_stock">gtk-no</property>
-                            <property name="secondary_icon_tooltip_text" translatable="yes">Reset</property>
+                            <property name="can-focus">True</property>
+                            <property name="secondary-icon-stock">gtk-no</property>
+                            <property name="secondary-icon-tooltip-text" translatable="yes">Reset</property>
                             <signal name="changed" handler="on_device_name_changed" swapped="no"/>
                             <signal name="icon-press" handler="on_entry_clear_click" swapped="no"/>
                           </object>
@@ -308,7 +321,7 @@ Author: Dmitry Kann
                     <child>
                       <object class="GtkLabel">
                         <property name="visible">True</property>
-                        <property name="can_focus">False</property>
+                        <property name="can-focus">False</property>
                         <property name="halign">start</property>
                         <property name="label" translatable="yes">Ports:</property>
                         <attributes>
@@ -324,20 +337,20 @@ Author: Dmitry Kann
                     <child>
                       <object class="GtkScrolledWindow">
                         <property name="visible">True</property>
-                        <property name="can_focus">True</property>
+                        <property name="can-focus">True</property>
                         <property name="hexpand">True</property>
                         <property name="vexpand">True</property>
-                        <property name="shadow_type">in</property>
+                        <property name="shadow-type">in</property>
                         <child>
                           <object class="GtkViewport">
                             <property name="visible">True</property>
-                            <property name="can_focus">False</property>
+                            <property name="can-focus">False</property>
                             <property name="hexpand">True</property>
                             <property name="vexpand">True</property>
                             <child>
                               <object class="GtkListBox" id="lbx_ports">
                                 <property name="visible">True</property>
-                                <property name="can_focus">False</property>
+                                <property name="can-focus">False</property>
                                 <property name="hexpand">True</property>
                                 <property name="vexpand">True</property>
                                 <signal name="row-selected" handler="on_port_row_selected" swapped="no"/>
@@ -354,143 +367,144 @@ Author: Dmitry Kann
                     </child>
                   </object>
                   <packing>
-                    <property name="left_attach">1</property>
-                    <property name="top_attach">1</property>
+                    <property name="left-attach">1</property>
+                    <property name="top-attach">1</property>
                   </packing>
                 </child>
                 <child>
+                  <!-- n-columns=2 n-rows=5 -->
                   <object class="GtkGrid" id="g_port_props">
                     <property name="visible">True</property>
-                    <property name="can_focus">False</property>
-                    <property name="row_spacing">6</property>
-                    <property name="column_spacing">6</property>
+                    <property name="can-focus">False</property>
+                    <property name="row-spacing">6</property>
+                    <property name="column-spacing">6</property>
                     <child>
                       <object class="GtkLabel">
                         <property name="visible">True</property>
-                        <property name="can_focus">False</property>
+                        <property name="can-focus">False</property>
                         <property name="halign">start</property>
                         <property name="label" translatable="yes">Visible:</property>
                       </object>
                       <packing>
-                        <property name="left_attach">0</property>
-                        <property name="top_attach">0</property>
+                        <property name="left-attach">0</property>
+                        <property name="top-attach">0</property>
                       </packing>
                     </child>
                     <child>
                       <object class="GtkSwitch" id="sw_port_visible">
                         <property name="visible">True</property>
-                        <property name="can_focus">True</property>
+                        <property name="can-focus">True</property>
                         <property name="halign">end</property>
                         <signal name="state-set" handler="on_port_visible_switched" swapped="no"/>
                       </object>
                       <packing>
-                        <property name="left_attach">1</property>
-                        <property name="top_attach">0</property>
+                        <property name="left-attach">1</property>
+                        <property name="top-attach">0</property>
                       </packing>
                     </child>
                     <child>
                       <object class="GtkLabel">
                         <property name="visible">True</property>
-                        <property name="can_focus">False</property>
+                        <property name="can-focus">False</property>
                         <property name="halign">start</property>
                         <property name="label" translatable="yes">Always available:</property>
                       </object>
                       <packing>
-                        <property name="left_attach">0</property>
-                        <property name="top_attach">1</property>
+                        <property name="left-attach">0</property>
+                        <property name="top-attach">1</property>
                       </packing>
                     </child>
                     <child>
                       <object class="GtkLabel">
                         <property name="visible">True</property>
-                        <property name="can_focus">False</property>
+                        <property name="can-focus">False</property>
                         <property name="halign">start</property>
                         <property name="label" translatable="yes">Custom name:</property>
                       </object>
                       <packing>
-                        <property name="left_attach">0</property>
-                        <property name="top_attach">2</property>
+                        <property name="left-attach">0</property>
+                        <property name="top-attach">2</property>
                       </packing>
                     </child>
                     <child>
                       <object class="GtkLabel">
                         <property name="visible">True</property>
-                        <property name="can_focus">False</property>
+                        <property name="can-focus">False</property>
                         <property name="halign">start</property>
                         <property name="label" translatable="yes">Preferred profile:</property>
                       </object>
                       <packing>
-                        <property name="left_attach">0</property>
-                        <property name="top_attach">3</property>
+                        <property name="left-attach">0</property>
+                        <property name="top-attach">3</property>
                       </packing>
                     </child>
                     <child>
                       <object class="GtkSwitch" id="sw_port_always_avail">
                         <property name="visible">True</property>
-                        <property name="can_focus">True</property>
+                        <property name="can-focus">True</property>
                         <property name="halign">end</property>
                         <signal name="state-set" handler="on_port_always_avail_switched" swapped="no"/>
                       </object>
                       <packing>
-                        <property name="left_attach">1</property>
-                        <property name="top_attach">1</property>
+                        <property name="left-attach">1</property>
+                        <property name="top-attach">1</property>
                       </packing>
                     </child>
                     <child>
                       <object class="GtkEntry" id="e_port_name">
                         <property name="visible">True</property>
-                        <property name="can_focus">True</property>
-                        <property name="secondary_icon_stock">gtk-no</property>
-                        <property name="secondary_icon_tooltip_text" translatable="yes">Reset</property>
+                        <property name="can-focus">True</property>
+                        <property name="secondary-icon-stock">gtk-no</property>
+                        <property name="secondary-icon-tooltip-text" translatable="yes">Reset</property>
                         <signal name="changed" handler="on_port_name_changed" swapped="no"/>
                         <signal name="icon-press" handler="on_entry_clear_click" swapped="no"/>
                       </object>
                       <packing>
-                        <property name="left_attach">1</property>
-                        <property name="top_attach">2</property>
+                        <property name="left-attach">1</property>
+                        <property name="top-attach">2</property>
                       </packing>
                     </child>
                     <child>
                       <object class="GtkComboBox" id="cb_port_pref_profile">
                         <property name="visible">True</property>
-                        <property name="can_focus">False</property>
+                        <property name="can-focus">False</property>
                         <property name="model">pref_profile_store</property>
-                        <property name="id_column">0</property>
+                        <property name="id-column">0</property>
                         <signal name="changed" handler="on_port_pref_profile_changed" swapped="no"/>
                       </object>
                       <packing>
-                        <property name="left_attach">1</property>
-                        <property name="top_attach">3</property>
+                        <property name="left-attach">1</property>
+                        <property name="top-attach">3</property>
                       </packing>
                     </child>
                     <child>
                       <object class="GtkLabel">
                         <property name="visible">True</property>
-                        <property name="can_focus">False</property>
+                        <property name="can-focus">False</property>
                         <property name="halign">start</property>
                         <property name="label" translatable="yes">Keyboard shortcut:</property>
                       </object>
                       <packing>
-                        <property name="left_attach">0</property>
-                        <property name="top_attach">4</property>
+                        <property name="left-attach">0</property>
+                        <property name="top-attach">4</property>
                       </packing>
                     </child>
                     <child>
                       <object class="GtkButton" id="b_port_set_shortcut">
                         <property name="visible">True</property>
-                        <property name="can_focus">True</property>
-                        <property name="receives_default">True</property>
+                        <property name="can-focus">True</property>
+                        <property name="receives-default">True</property>
                         <signal name="clicked" handler="on_port_set_shortcut_clicked" swapped="no"/>
                       </object>
                       <packing>
-                        <property name="left_attach">1</property>
-                        <property name="top_attach">4</property>
+                        <property name="left-attach">1</property>
+                        <property name="top-attach">4</property>
                       </packing>
                     </child>
                   </object>
                   <packing>
-                    <property name="left_attach">2</property>
-                    <property name="top_attach">1</property>
+                    <property name="left-attach">2</property>
+                    <property name="top-attach">1</property>
                   </packing>
                 </child>
               </object>
@@ -501,13 +515,13 @@ Author: Dmitry Kann
             <child type="tab">
               <object class="GtkLabel">
                 <property name="visible">True</property>
-                <property name="can_focus">False</property>
+                <property name="can-focus">False</property>
                 <property name="label" translatable="yes">_Devices</property>
-                <property name="use_underline">True</property>
+                <property name="use-underline">True</property>
               </object>
               <packing>
                 <property name="position">1</property>
-                <property name="tab_fill">False</property>
+                <property name="tab-fill">False</property>
               </packing>
             </child>
             <child>
@@ -525,5 +539,29 @@ Author: Dmitry Kann
         </child>
       </object>
     </child>
+    <child type="titlebar">
+      <object class="GtkHeaderBar">
+        <property name="visible">True</property>
+        <property name="can-focus">False</property>
+        <property name="title" translatable="yes">Preferences</property>
+        <property name="subtitle" translatable="yes">Sound Switcher Indicator</property>
+        <property name="show-close-button">True</property>
+        <property name="decoration-layout">close,maximize</property>
+        <child>
+          <object class="GtkButton">
+            <property name="label">gtk-refresh</property>
+            <property name="visible">True</property>
+            <property name="can-focus">True</property>
+            <property name="receives-default">True</property>
+            <property name="use-stock">True</property>
+            <property name="always-show-image">True</property>
+            <signal name="clicked" handler="on_refresh" swapped="no"/>
+          </object>
+          <packing>
+            <property name="pack-type">end</property>
+          </packing>
+        </child>
+      </object>
+    </child>
   </object>
 </interface>
diff --git a/lib/indicator_sound_switcher/prefs.py b/lib/indicator_sound_switcher/prefs.py
index 38a1f9d..8291e07 100644
--- a/lib/indicator_sound_switcher/prefs.py
+++ b/lib/indicator_sound_switcher/prefs.py
@@ -270,6 +270,58 @@ def on_destroy(self, dlg):
         # Make sure config update has run
         self.indicator_refresh_cb()
 
+    def on_config_prune(self, *args):
+        """Signal handler: Prune configuration button clicked."""
+        logging.debug('PreferencesDialog.on_config_prune()')
+
+        # Show a confirmation dialog
+        pruned = False
+        cnt = 0
+        dialog = Gtk.MessageDialog(
+            transient_for=self.prefs_dialog,
+            flags=0,
+            message_type=Gtk.MessageType.WARNING,
+            buttons=Gtk.ButtonsType.OK_CANCEL,
+            text=_('Prune configuration'))
+        dialog.format_secondary_text(_(
+            'This will remove any settings about devices that are currently offline, such as Bluetooth headphones or '
+            'external sound cards.\n\n'
+            'Do you wish to continue?'))
+        response = dialog.run()
+        if response == Gtk.ResponseType.OK:
+            # Make a set of known devices
+            known = {card.name for card in self.indicator.cards.values()}
+            logging.debug('Pruning config')
+
+            # Remove unknown devices from the config
+            for name in list(self.indicator.config['devices'].keys()):
+                if name not in known:
+                    del self.indicator.config['devices'][name]
+                    cnt += 1
+                    logging.debug('  - Pruned device `%s`', name)
+
+            # Save the configuration if there was a change
+            if cnt > 0:
+                logging.debug('Config changed, saving')
+                self.indicator.config_save()
+
+            pruned = True
+
+        # Kill the dialog
+        dialog.destroy()
+
+        # Show info message after pruning
+        if pruned:
+            info_dlg = Gtk.MessageDialog(
+                transient_for=self.prefs_dialog,
+                flags=0,
+                message_type=Gtk.MessageType.INFO,
+                buttons=Gtk.ButtonsType.CLOSE,
+                text=_('Prune configuration'))
+            info_dlg.format_secondary_text(_('Removed {} device configuration entries.').format(cnt))
+            info_dlg.run()
+            info_dlg.destroy()
+
     def on_refresh(self, *args):
         """Signal handler: Refresh button clicked."""
         logging.debug('PreferencesDialog.on_refresh()')
diff --git a/po/indicator-sound-switcher.pot b/po/indicator-sound-switcher.pot
index 99de7ab..6211e0d 100644
--- a/po/indicator-sound-switcher.pot
+++ b/po/indicator-sound-switcher.pot
@@ -8,7 +8,7 @@ msgid ""
 msgstr ""
 "Project-Id-Version: PACKAGE VERSION\n"
 "Report-Msgid-Bugs-To: \n"
-"POT-Creation-Date: 2021-01-03 17:38+0100\n"
+"POT-Creation-Date: 2022-06-28 11:21+0200\n"
 "PO-Revision-Date: YEAR-MO-DA HO:MI+ZONE\n"
 "Last-Translator: FULL NAME <EMAIL@ADDRESS>\n"
 "Language-Team: LANGUAGE <LL@li.org>\n"
@@ -17,124 +17,179 @@ msgstr ""
 "Content-Type: text/plain; charset=UTF-8\n"
 "Content-Transfer-Encoding: 8bit\n"
 
-#: lib/indicator_sound_switcher/prefs.py:181
-msgid "Out"
-msgstr ""
-
-#: lib/indicator_sound_switcher/prefs.py:181
-msgid "In"
-msgstr ""
-
-#: lib/indicator_sound_switcher/prefs.py:216
-#: lib/indicator_sound_switcher/prefs.py:224
-#: lib/indicator_sound_switcher/prefs.py:400
-msgid "(none)"
-msgstr ""
-
-#: lib/indicator_sound_switcher/prefs.py:417
-msgid "Keyboard shortcut"
-msgstr ""
-
-#: lib/indicator_sound_switcher/prefs.py:424
-msgid ""
-"Press the desired key combination, <b>Backspace</b> to remove any shortcut, "
-"or <b>Esc</b> to cancel."
-msgstr ""
-
-#: lib/indicator_sound_switcher/prefs.glade:49
+#: build/lib/indicator_sound_switcher/prefs.glade:49
+#: lib/indicator_sound_switcher/prefs.glade:546
 msgid "Preferences"
 msgstr ""
 
-#: lib/indicator_sound_switcher/prefs.glade:50
+#: build/lib/indicator_sound_switcher/prefs.glade:50
+#: lib/indicator_sound_switcher/prefs.glade:547
 msgid "Sound Switcher Indicator"
 msgstr ""
 
-#: lib/indicator_sound_switcher/prefs.glade:111
+#: build/lib/indicator_sound_switcher/prefs.glade:111
+#: lib/indicator_sound_switcher/prefs.glade:90
 msgid "Show inputs"
 msgstr ""
 
-#: lib/indicator_sound_switcher/prefs.glade:126
+#: build/lib/indicator_sound_switcher/prefs.glade:126
+#: lib/indicator_sound_switcher/prefs.glade:105
 msgid "Show outputs"
 msgstr ""
 
-#: lib/indicator_sound_switcher/prefs.glade:166
+#: build/lib/indicator_sound_switcher/prefs.glade:166
+#: lib/indicator_sound_switcher/prefs.glade:178
 msgid "_General"
 msgstr ""
 
-#: lib/indicator_sound_switcher/prefs.glade:189
+#: build/lib/indicator_sound_switcher/prefs.glade:189
+#: lib/indicator_sound_switcher/prefs.glade:202
 msgid "Devices"
 msgstr ""
 
-#: lib/indicator_sound_switcher/prefs.glade:204
+#: build/lib/indicator_sound_switcher/prefs.glade:204
+#: lib/indicator_sound_switcher/prefs.glade:217
 msgid "Device settings"
 msgstr ""
 
-#: lib/indicator_sound_switcher/prefs.glade:219
+#: build/lib/indicator_sound_switcher/prefs.glade:219
+#: lib/indicator_sound_switcher/prefs.glade:232
 msgid "Port settings"
 msgstr ""
 
-#: lib/indicator_sound_switcher/prefs.glade:278
-#: lib/indicator_sound_switcher/prefs.glade:408
+#: build/lib/indicator_sound_switcher/prefs.glade:278
+#: build/lib/indicator_sound_switcher/prefs.glade:408
+#: lib/indicator_sound_switcher/prefs.glade:291
+#: lib/indicator_sound_switcher/prefs.glade:422
 msgid "Custom name:"
 msgstr ""
 
-#: lib/indicator_sound_switcher/prefs.glade:291
-#: lib/indicator_sound_switcher/prefs.glade:444
+#: build/lib/indicator_sound_switcher/prefs.glade:291
+#: build/lib/indicator_sound_switcher/prefs.glade:444
+#: lib/indicator_sound_switcher/prefs.glade:304
+#: lib/indicator_sound_switcher/prefs.glade:458
 msgid "Reset"
 msgstr ""
 
-#: lib/indicator_sound_switcher/prefs.glade:313
+#: build/lib/indicator_sound_switcher/prefs.glade:313
+#: lib/indicator_sound_switcher/prefs.glade:326
 msgid "Ports:"
 msgstr ""
 
-#: lib/indicator_sound_switcher/prefs.glade:372
+#: build/lib/indicator_sound_switcher/prefs.glade:372
+#: lib/indicator_sound_switcher/prefs.glade:386
 msgid "Visible:"
 msgstr ""
 
-#: lib/indicator_sound_switcher/prefs.glade:396
+#: build/lib/indicator_sound_switcher/prefs.glade:396
+#: lib/indicator_sound_switcher/prefs.glade:410
 msgid "Always available:"
 msgstr ""
 
-#: lib/indicator_sound_switcher/prefs.glade:420
+#: build/lib/indicator_sound_switcher/prefs.glade:420
+#: lib/indicator_sound_switcher/prefs.glade:434
 msgid "Preferred profile:"
 msgstr ""
 
-#: lib/indicator_sound_switcher/prefs.glade:471
+#: build/lib/indicator_sound_switcher/prefs.glade:471
+#: lib/indicator_sound_switcher/prefs.glade:485
 msgid "Keyboard shortcut:"
 msgstr ""
 
-#: lib/indicator_sound_switcher/prefs.glade:505
+#: build/lib/indicator_sound_switcher/prefs.glade:505
+#: lib/indicator_sound_switcher/prefs.glade:519
 msgid "_Devices"
 msgstr ""
 
+#: build/lib/indicator_sound_switcher/port.py:99
 #: lib/indicator_sound_switcher/port.py:99
 msgid "(unknown device)"
 msgstr ""
 
+#: build/lib/indicator_sound_switcher/prefs.py:181
+#: lib/indicator_sound_switcher/prefs.py:182
+msgid "Out"
+msgstr ""
+
+#: build/lib/indicator_sound_switcher/prefs.py:181
+#: lib/indicator_sound_switcher/prefs.py:182
+msgid "In"
+msgstr ""
+
+#: build/lib/indicator_sound_switcher/prefs.py:216
+#: build/lib/indicator_sound_switcher/prefs.py:224
+#: build/lib/indicator_sound_switcher/prefs.py:400
+#: lib/indicator_sound_switcher/card.py:71
+#: lib/indicator_sound_switcher/prefs.py:217
+#: lib/indicator_sound_switcher/prefs.py:225
+#: lib/indicator_sound_switcher/prefs.py:446
+msgid "(none)"
+msgstr ""
+
+#: build/lib/indicator_sound_switcher/prefs.py:417
+#: lib/indicator_sound_switcher/prefs.py:463
+msgid "Keyboard shortcut"
+msgstr ""
+
+#: build/lib/indicator_sound_switcher/prefs.py:424
+#: lib/indicator_sound_switcher/prefs.py:470
+msgid ""
+"Press the desired key combination, <b>Backspace</b> to remove any shortcut, "
+"or <b>Esc</b> to cancel."
+msgstr ""
+
+#: build/lib/indicator_sound_switcher/indicator.py:192
 #: lib/indicator_sound_switcher/indicator.py:195
 msgid "Written by Dmitry Kann"
 msgstr ""
 
-#: lib/indicator_sound_switcher/indicator.py:993
+#: build/lib/indicator_sound_switcher/indicator.py:990
+#: lib/indicator_sound_switcher/indicator.py:1041
 msgid "Inputs"
 msgstr ""
 
-#: lib/indicator_sound_switcher/indicator.py:1001
+#: build/lib/indicator_sound_switcher/indicator.py:998
+#: lib/indicator_sound_switcher/indicator.py:1049
 msgid "Outputs"
 msgstr ""
 
-#: lib/indicator_sound_switcher/indicator.py:1008
+#: build/lib/indicator_sound_switcher/indicator.py:1005
+#: lib/indicator_sound_switcher/indicator.py:1056
 msgid "_Refresh"
 msgstr ""
 
-#: lib/indicator_sound_switcher/indicator.py:1009
+#: build/lib/indicator_sound_switcher/indicator.py:1006
+#: lib/indicator_sound_switcher/indicator.py:1057
 msgid "_Preferences…"
 msgstr ""
 
-#: lib/indicator_sound_switcher/indicator.py:1010
+#: build/lib/indicator_sound_switcher/indicator.py:1007
+#: lib/indicator_sound_switcher/indicator.py:1058
 msgid "_About"
 msgstr ""
 
-#: lib/indicator_sound_switcher/indicator.py:1011
+#: build/lib/indicator_sound_switcher/indicator.py:1008
+#: lib/indicator_sound_switcher/indicator.py:1059
 msgid "_Quit"
 msgstr ""
+
+#: lib/indicator_sound_switcher/prefs.glade:153
+msgid "Prune configuration…"
+msgstr ""
+
+#: lib/indicator_sound_switcher/prefs.py:285
+#: lib/indicator_sound_switcher/prefs.py:320
+msgid "Prune configuration"
+msgstr ""
+
+#: lib/indicator_sound_switcher/prefs.py:287
+msgid ""
+"This will remove any settings about devices that are currently offline, such "
+"as Bluetooth headphones or external sound cards.\n"
+"\n"
+"Do you wish to continue?"
+msgstr ""
+
+#: lib/indicator_sound_switcher/prefs.py:321
+msgid "Removed {} device configuration entries."
+msgstr ""
diff --git a/po/nl.po b/po/nl.po
index abe801c..d50c803 100644
--- a/po/nl.po
+++ b/po/nl.po
@@ -7,137 +7,196 @@ msgid ""
 msgstr ""
 "Project-Id-Version: \n"
 "Report-Msgid-Bugs-To: \n"
-"POT-Creation-Date: 2020-05-26 18:43+0200\n"
-"PO-Revision-Date: 2020-05-26 18:50+0200\n"
+"POT-Creation-Date: 2022-06-28 11:21+0200\n"
+"PO-Revision-Date: 2022-06-28 11:24+0200\n"
 "Last-Translator: Dmitry Kann <yktooo@gmail.com>\n"
 "Language-Team: \n"
 "Language: nl\n"
 "MIME-Version: 1.0\n"
 "Content-Type: text/plain; charset=UTF-8\n"
 "Content-Transfer-Encoding: 8bit\n"
-"X-Generator: Poedit 2.3.1\n"
 "Plural-Forms: nplurals=2; plural=(n != 1);\n"
+"X-Generator: Poedit 3.0.1\n"
 
-#: lib/indicator_sound_switcher/port.py:99
-msgid "(unknown device)"
-msgstr "(onbekende kaart)"
-
-#: lib/indicator_sound_switcher/prefs.py:178
-msgid "Out"
-msgstr "Uitgang"
-
-#: lib/indicator_sound_switcher/prefs.py:178
-msgid "In"
-msgstr "Ingang"
-
-#: lib/indicator_sound_switcher/prefs.py:213
-#: lib/indicator_sound_switcher/prefs.py:221
-#: lib/indicator_sound_switcher/prefs.py:397
-msgid "(none)"
-msgstr "(geen)"
-
-#: lib/indicator_sound_switcher/prefs.py:414
-msgid "Keyboard shortcut"
-msgstr "Sneltoets"
-
-#: lib/indicator_sound_switcher/prefs.py:421
-msgid ""
-"Press the desired key combination, <b>Backspace</b> to remove any shortcut, "
-"or <b>Esc</b> to cancel."
-msgstr ""
-"Druk op de gewenste toetscombinatie, <b>Backspace</b> om de snelkoppeling "
-"te verwijderen of <b>Esc</b> om te annuleren."
-
-#: lib/indicator_sound_switcher/indicator.py:192
-msgid "Written by Dmitry Kann"
-msgstr "Auteur: Dmitry Kann"
-
-#: lib/indicator_sound_switcher/indicator.py:990
-msgid "Inputs"
-msgstr "Ingangen"
-
-#: lib/indicator_sound_switcher/indicator.py:998
-msgid "Outputs"
-msgstr "Uitgangen"
-
-#: lib/indicator_sound_switcher/indicator.py:1005
-msgid "_Refresh"
-msgstr "_Verversen"
-
-#: lib/indicator_sound_switcher/indicator.py:1006
-msgid "_Preferences…"
-msgstr "_Instellingen…"
-
-#: lib/indicator_sound_switcher/indicator.py:1007
-msgid "_About"
-msgstr "_Over"
-
-#: lib/indicator_sound_switcher/indicator.py:1008
-msgid "_Quit"
-msgstr "_Afsluiten"
-
-#: lib/indicator_sound_switcher/prefs.glade:49
+#: build/lib/indicator_sound_switcher/prefs.glade:49
+#: lib/indicator_sound_switcher/prefs.glade:546
 msgid "Preferences"
 msgstr "Instellingen"
 
-#: lib/indicator_sound_switcher/prefs.glade:50
+#: build/lib/indicator_sound_switcher/prefs.glade:50
+#: lib/indicator_sound_switcher/prefs.glade:547
 msgid "Sound Switcher Indicator"
 msgstr "Sound Switcher Indicator"
 
-#: lib/indicator_sound_switcher/prefs.glade:114
+#: build/lib/indicator_sound_switcher/prefs.glade:111
+#: lib/indicator_sound_switcher/prefs.glade:90
 msgid "Show inputs"
 msgstr "Ingangen tonen"
 
-#: lib/indicator_sound_switcher/prefs.glade:129
+#: build/lib/indicator_sound_switcher/prefs.glade:126
+#: lib/indicator_sound_switcher/prefs.glade:105
 msgid "Show outputs"
 msgstr "Uitgangen tonen"
 
-#: lib/indicator_sound_switcher/prefs.glade:169
+#: build/lib/indicator_sound_switcher/prefs.glade:166
+#: lib/indicator_sound_switcher/prefs.glade:178
 msgid "_General"
 msgstr "_Algemeen"
 
-#: lib/indicator_sound_switcher/prefs.glade:192
+#: build/lib/indicator_sound_switcher/prefs.glade:189
+#: lib/indicator_sound_switcher/prefs.glade:202
 msgid "Devices"
 msgstr "Kaarten"
 
-#: lib/indicator_sound_switcher/prefs.glade:207
+#: build/lib/indicator_sound_switcher/prefs.glade:204
+#: lib/indicator_sound_switcher/prefs.glade:217
 msgid "Device settings"
 msgstr "Kaartinstellingen"
 
-#: lib/indicator_sound_switcher/prefs.glade:222
+#: build/lib/indicator_sound_switcher/prefs.glade:219
+#: lib/indicator_sound_switcher/prefs.glade:232
 msgid "Port settings"
 msgstr "Poortinstellingen"
 
-#: lib/indicator_sound_switcher/prefs.glade:281
-#: lib/indicator_sound_switcher/prefs.glade:411
+#: build/lib/indicator_sound_switcher/prefs.glade:278
+#: build/lib/indicator_sound_switcher/prefs.glade:408
+#: lib/indicator_sound_switcher/prefs.glade:291
+#: lib/indicator_sound_switcher/prefs.glade:422
 msgid "Custom name:"
 msgstr "Zichtbare naam:"
 
-#: lib/indicator_sound_switcher/prefs.glade:294
-#: lib/indicator_sound_switcher/prefs.glade:447
+#: build/lib/indicator_sound_switcher/prefs.glade:291
+#: build/lib/indicator_sound_switcher/prefs.glade:444
+#: lib/indicator_sound_switcher/prefs.glade:304
+#: lib/indicator_sound_switcher/prefs.glade:458
 msgid "Reset"
 msgstr "Wissen"
 
-#: lib/indicator_sound_switcher/prefs.glade:316
+#: build/lib/indicator_sound_switcher/prefs.glade:313
+#: lib/indicator_sound_switcher/prefs.glade:326
 msgid "Ports:"
 msgstr "Poorten:"
 
-#: lib/indicator_sound_switcher/prefs.glade:375
+#: build/lib/indicator_sound_switcher/prefs.glade:372
+#: lib/indicator_sound_switcher/prefs.glade:386
 msgid "Visible:"
 msgstr "Zichtbaar:"
 
-#: lib/indicator_sound_switcher/prefs.glade:399
+#: build/lib/indicator_sound_switcher/prefs.glade:396
+#: lib/indicator_sound_switcher/prefs.glade:410
 msgid "Always available:"
 msgstr "Altijd aanwezig:"
 
-#: lib/indicator_sound_switcher/prefs.glade:423
+#: build/lib/indicator_sound_switcher/prefs.glade:420
+#: lib/indicator_sound_switcher/prefs.glade:434
 msgid "Preferred profile:"
 msgstr "Profielvoorkeur:"
 
-#: lib/indicator_sound_switcher/prefs.glade:474
+#: build/lib/indicator_sound_switcher/prefs.glade:471
+#: lib/indicator_sound_switcher/prefs.glade:485
 msgid "Keyboard shortcut:"
 msgstr "Sneltoets:"
 
-#: lib/indicator_sound_switcher/prefs.glade:509
+#: build/lib/indicator_sound_switcher/prefs.glade:505
+#: lib/indicator_sound_switcher/prefs.glade:519
 msgid "_Devices"
 msgstr "_Kaarten"
+
+#: build/lib/indicator_sound_switcher/port.py:99
+#: lib/indicator_sound_switcher/port.py:99
+msgid "(unknown device)"
+msgstr "(onbekende kaart)"
+
+#: build/lib/indicator_sound_switcher/prefs.py:181
+#: lib/indicator_sound_switcher/prefs.py:182
+msgid "Out"
+msgstr "Uitgang"
+
+#: build/lib/indicator_sound_switcher/prefs.py:181
+#: lib/indicator_sound_switcher/prefs.py:182
+msgid "In"
+msgstr "Ingang"
+
+#: build/lib/indicator_sound_switcher/prefs.py:216
+#: build/lib/indicator_sound_switcher/prefs.py:224
+#: build/lib/indicator_sound_switcher/prefs.py:400
+#: lib/indicator_sound_switcher/card.py:71
+#: lib/indicator_sound_switcher/prefs.py:217
+#: lib/indicator_sound_switcher/prefs.py:225
+#: lib/indicator_sound_switcher/prefs.py:446
+msgid "(none)"
+msgstr "(geen)"
+
+#: build/lib/indicator_sound_switcher/prefs.py:417
+#: lib/indicator_sound_switcher/prefs.py:463
+msgid "Keyboard shortcut"
+msgstr "Sneltoets"
+
+#: build/lib/indicator_sound_switcher/prefs.py:424
+#: lib/indicator_sound_switcher/prefs.py:470
+msgid ""
+"Press the desired key combination, <b>Backspace</b> to remove any shortcut, "
+"or <b>Esc</b> to cancel."
+msgstr ""
+"Druk op de gewenste toetscombinatie, <b>Backspace</b> om de snelkoppeling te "
+"verwijderen of <b>Esc</b> om te annuleren."
+
+#: build/lib/indicator_sound_switcher/indicator.py:192
+#: lib/indicator_sound_switcher/indicator.py:195
+msgid "Written by Dmitry Kann"
+msgstr "Auteur: Dmitry Kann"
+
+#: build/lib/indicator_sound_switcher/indicator.py:990
+#: lib/indicator_sound_switcher/indicator.py:1041
+msgid "Inputs"
+msgstr "Ingangen"
+
+#: build/lib/indicator_sound_switcher/indicator.py:998
+#: lib/indicator_sound_switcher/indicator.py:1049
+msgid "Outputs"
+msgstr "Uitgangen"
+
+#: build/lib/indicator_sound_switcher/indicator.py:1005
+#: lib/indicator_sound_switcher/indicator.py:1056
+msgid "_Refresh"
+msgstr "_Verversen"
+
+#: build/lib/indicator_sound_switcher/indicator.py:1006
+#: lib/indicator_sound_switcher/indicator.py:1057
+msgid "_Preferences…"
+msgstr "_Instellingen…"
+
+#: build/lib/indicator_sound_switcher/indicator.py:1007
+#: lib/indicator_sound_switcher/indicator.py:1058
+msgid "_About"
+msgstr "_Over"
+
+#: build/lib/indicator_sound_switcher/indicator.py:1008
+#: lib/indicator_sound_switcher/indicator.py:1059
+msgid "_Quit"
+msgstr "_Afsluiten"
+
+#: lib/indicator_sound_switcher/prefs.glade:153
+msgid "Prune configuration…"
+msgstr "Configuratie opschonen…"
+
+#: lib/indicator_sound_switcher/prefs.py:285
+#: lib/indicator_sound_switcher/prefs.py:320
+msgid "Prune configuration"
+msgstr "Configuratie opschonen"
+
+#: lib/indicator_sound_switcher/prefs.py:287
+msgid ""
+"This will remove any settings about devices that are currently offline, such "
+"as Bluetooth headphones or external sound cards.\n"
+"\n"
+"Do you wish to continue?"
+msgstr ""
+"Dit zal alle instellingen verwijderen van apparaten die momenteel offline "
+"zijn, zoals Bluetooth-hoofdtelefoons of externe geluidskaarten.\n"
+"\n"
+"Wil je doorgaan?"
+
+#: lib/indicator_sound_switcher/prefs.py:321
+msgid "Removed {} device configuration entries."
+msgstr "{} apparaatconfiguratie-items verwijderd."
diff --git a/po/ru.po b/po/ru.po
index 465f896..fd8bf27 100644
--- a/po/ru.po
+++ b/po/ru.po
@@ -6,139 +6,198 @@ msgid ""
 msgstr ""
 "Project-Id-Version: \n"
 "Report-Msgid-Bugs-To: \n"
-"POT-Creation-Date: 2020-05-26 18:43+0200\n"
-"PO-Revision-Date: 2020-05-26 18:47+0200\n"
+"POT-Creation-Date: 2022-06-28 11:21+0200\n"
+"PO-Revision-Date: 2022-06-28 11:22+0200\n"
 "Last-Translator: Dmitry Kann <yktooo@gmail.com>\n"
 "Language-Team: \n"
 "Language: ru\n"
 "MIME-Version: 1.0\n"
 "Content-Type: text/plain; charset=UTF-8\n"
 "Content-Transfer-Encoding: 8bit\n"
+"Plural-Forms: nplurals=3; plural=(n%10==1 && n%100!=11 ? 0 : n%10>=2 && "
+"n%10<=4 && (n%100<10 || n%100>=20) ? 1 : 2);\n"
 "Generated-By: pygettext.py 1.5\n"
-"X-Generator: Poedit 2.3.1\n"
-"Plural-Forms: nplurals=3; plural=(n%10==1 && n%100!=11 ? 0 : n%10>=2 && n"
-"%10<=4 && (n%100<10 || n%100>=20) ? 1 : 2);\n"
+"X-Generator: Poedit 3.0.1\n"
 
-#: lib/indicator_sound_switcher/port.py:99
-msgid "(unknown device)"
-msgstr "(неизвестное устройство)"
-
-#: lib/indicator_sound_switcher/prefs.py:178
-msgid "Out"
-msgstr "Выход"
-
-#: lib/indicator_sound_switcher/prefs.py:178
-msgid "In"
-msgstr "Вход"
-
-#: lib/indicator_sound_switcher/prefs.py:213
-#: lib/indicator_sound_switcher/prefs.py:221
-#: lib/indicator_sound_switcher/prefs.py:397
-msgid "(none)"
-msgstr "(нет)"
-
-#: lib/indicator_sound_switcher/prefs.py:414
-msgid "Keyboard shortcut"
-msgstr "Сочетание клавиш"
-
-#: lib/indicator_sound_switcher/prefs.py:421
-msgid ""
-"Press the desired key combination, <b>Backspace</b> to remove any shortcut, "
-"or <b>Esc</b> to cancel."
-msgstr ""
-"Нажмите желаемую комбинацию клавиш, <b>Backspace</b>, чтобы удалить "
-"заданную комбинацию, или <b>Esc</b> для отмены."
-
-#: lib/indicator_sound_switcher/indicator.py:192
-msgid "Written by Dmitry Kann"
-msgstr "Автор: Дмитрий Канн"
-
-#: lib/indicator_sound_switcher/indicator.py:990
-msgid "Inputs"
-msgstr "Входы"
-
-#: lib/indicator_sound_switcher/indicator.py:998
-msgid "Outputs"
-msgstr "Выходы"
-
-#: lib/indicator_sound_switcher/indicator.py:1005
-msgid "_Refresh"
-msgstr "_Обновить"
-
-#: lib/indicator_sound_switcher/indicator.py:1006
-msgid "_Preferences…"
-msgstr "_Настройки…"
-
-#: lib/indicator_sound_switcher/indicator.py:1007
-msgid "_About"
-msgstr "О _программе"
-
-#: lib/indicator_sound_switcher/indicator.py:1008
-msgid "_Quit"
-msgstr "В_ыход"
-
-#: lib/indicator_sound_switcher/prefs.glade:49
+#: build/lib/indicator_sound_switcher/prefs.glade:49
+#: lib/indicator_sound_switcher/prefs.glade:546
 msgid "Preferences"
 msgstr "Настройки"
 
-#: lib/indicator_sound_switcher/prefs.glade:50
+#: build/lib/indicator_sound_switcher/prefs.glade:50
+#: lib/indicator_sound_switcher/prefs.glade:547
 msgid "Sound Switcher Indicator"
 msgstr "Sound Switcher Indicator"
 
-#: lib/indicator_sound_switcher/prefs.glade:114
+#: build/lib/indicator_sound_switcher/prefs.glade:111
+#: lib/indicator_sound_switcher/prefs.glade:90
 msgid "Show inputs"
 msgstr "Отображать входы"
 
-#: lib/indicator_sound_switcher/prefs.glade:129
+#: build/lib/indicator_sound_switcher/prefs.glade:126
+#: lib/indicator_sound_switcher/prefs.glade:105
 msgid "Show outputs"
 msgstr "Отображать выходы"
 
-#: lib/indicator_sound_switcher/prefs.glade:169
+#: build/lib/indicator_sound_switcher/prefs.glade:166
+#: lib/indicator_sound_switcher/prefs.glade:178
 msgid "_General"
 msgstr "_Общие"
 
-#: lib/indicator_sound_switcher/prefs.glade:192
+#: build/lib/indicator_sound_switcher/prefs.glade:189
+#: lib/indicator_sound_switcher/prefs.glade:202
 msgid "Devices"
 msgstr "Устройства"
 
-#: lib/indicator_sound_switcher/prefs.glade:207
+#: build/lib/indicator_sound_switcher/prefs.glade:204
+#: lib/indicator_sound_switcher/prefs.glade:217
 msgid "Device settings"
 msgstr "Настройки устройства"
 
-#: lib/indicator_sound_switcher/prefs.glade:222
+#: build/lib/indicator_sound_switcher/prefs.glade:219
+#: lib/indicator_sound_switcher/prefs.glade:232
 msgid "Port settings"
 msgstr "Настройки порта"
 
-#: lib/indicator_sound_switcher/prefs.glade:281
-#: lib/indicator_sound_switcher/prefs.glade:411
+#: build/lib/indicator_sound_switcher/prefs.glade:278
+#: build/lib/indicator_sound_switcher/prefs.glade:408
+#: lib/indicator_sound_switcher/prefs.glade:291
+#: lib/indicator_sound_switcher/prefs.glade:422
 msgid "Custom name:"
 msgstr "Использовать имя:"
 
-#: lib/indicator_sound_switcher/prefs.glade:294
-#: lib/indicator_sound_switcher/prefs.glade:447
+#: build/lib/indicator_sound_switcher/prefs.glade:291
+#: build/lib/indicator_sound_switcher/prefs.glade:444
+#: lib/indicator_sound_switcher/prefs.glade:304
+#: lib/indicator_sound_switcher/prefs.glade:458
 msgid "Reset"
 msgstr "Сбросить"
 
-#: lib/indicator_sound_switcher/prefs.glade:316
+#: build/lib/indicator_sound_switcher/prefs.glade:313
+#: lib/indicator_sound_switcher/prefs.glade:326
 msgid "Ports:"
 msgstr "Порты:"
 
-#: lib/indicator_sound_switcher/prefs.glade:375
+#: build/lib/indicator_sound_switcher/prefs.glade:372
+#: lib/indicator_sound_switcher/prefs.glade:386
 msgid "Visible:"
 msgstr "Видим:"
 
-#: lib/indicator_sound_switcher/prefs.glade:399
+#: build/lib/indicator_sound_switcher/prefs.glade:396
+#: lib/indicator_sound_switcher/prefs.glade:410
 msgid "Always available:"
 msgstr "Всегда доступен:"
 
-#: lib/indicator_sound_switcher/prefs.glade:423
+#: build/lib/indicator_sound_switcher/prefs.glade:420
+#: lib/indicator_sound_switcher/prefs.glade:434
 msgid "Preferred profile:"
 msgstr "Предпочтительный профиль:"
 
-#: lib/indicator_sound_switcher/prefs.glade:474
+#: build/lib/indicator_sound_switcher/prefs.glade:471
+#: lib/indicator_sound_switcher/prefs.glade:485
 msgid "Keyboard shortcut:"
 msgstr "Сочетание клавиш:"
 
-#: lib/indicator_sound_switcher/prefs.glade:509
+#: build/lib/indicator_sound_switcher/prefs.glade:505
+#: lib/indicator_sound_switcher/prefs.glade:519
 msgid "_Devices"
 msgstr "_Устройства"
+
+#: build/lib/indicator_sound_switcher/port.py:99
+#: lib/indicator_sound_switcher/port.py:99
+msgid "(unknown device)"
+msgstr "(неизвестное устройство)"
+
+#: build/lib/indicator_sound_switcher/prefs.py:181
+#: lib/indicator_sound_switcher/prefs.py:182
+msgid "Out"
+msgstr "Выход"
+
+#: build/lib/indicator_sound_switcher/prefs.py:181
+#: lib/indicator_sound_switcher/prefs.py:182
+msgid "In"
+msgstr "Вход"
+
+#: build/lib/indicator_sound_switcher/prefs.py:216
+#: build/lib/indicator_sound_switcher/prefs.py:224
+#: build/lib/indicator_sound_switcher/prefs.py:400
+#: lib/indicator_sound_switcher/card.py:71
+#: lib/indicator_sound_switcher/prefs.py:217
+#: lib/indicator_sound_switcher/prefs.py:225
+#: lib/indicator_sound_switcher/prefs.py:446
+msgid "(none)"
+msgstr "(нет)"
+
+#: build/lib/indicator_sound_switcher/prefs.py:417
+#: lib/indicator_sound_switcher/prefs.py:463
+msgid "Keyboard shortcut"
+msgstr "Сочетание клавиш"
+
+#: build/lib/indicator_sound_switcher/prefs.py:424
+#: lib/indicator_sound_switcher/prefs.py:470
+msgid ""
+"Press the desired key combination, <b>Backspace</b> to remove any shortcut, "
+"or <b>Esc</b> to cancel."
+msgstr ""
+"Нажмите желаемую комбинацию клавиш, <b>Backspace</b>, чтобы удалить заданную "
+"комбинацию, или <b>Esc</b> для отмены."
+
+#: build/lib/indicator_sound_switcher/indicator.py:192
+#: lib/indicator_sound_switcher/indicator.py:195
+msgid "Written by Dmitry Kann"
+msgstr "Автор: Дмитрий Канн"
+
+#: build/lib/indicator_sound_switcher/indicator.py:990
+#: lib/indicator_sound_switcher/indicator.py:1041
+msgid "Inputs"
+msgstr "Входы"
+
+#: build/lib/indicator_sound_switcher/indicator.py:998
+#: lib/indicator_sound_switcher/indicator.py:1049
+msgid "Outputs"
+msgstr "Выходы"
+
+#: build/lib/indicator_sound_switcher/indicator.py:1005
+#: lib/indicator_sound_switcher/indicator.py:1056
+msgid "_Refresh"
+msgstr "_Обновить"
+
+#: build/lib/indicator_sound_switcher/indicator.py:1006
+#: lib/indicator_sound_switcher/indicator.py:1057
+msgid "_Preferences…"
+msgstr "_Настройки…"
+
+#: build/lib/indicator_sound_switcher/indicator.py:1007
+#: lib/indicator_sound_switcher/indicator.py:1058
+msgid "_About"
+msgstr "О _программе"
+
+#: build/lib/indicator_sound_switcher/indicator.py:1008
+#: lib/indicator_sound_switcher/indicator.py:1059
+msgid "_Quit"
+msgstr "В_ыход"
+
+#: lib/indicator_sound_switcher/prefs.glade:153
+msgid "Prune configuration…"
+msgstr "Очистить конфигурацию…"
+
+#: lib/indicator_sound_switcher/prefs.py:285
+#: lib/indicator_sound_switcher/prefs.py:320
+msgid "Prune configuration"
+msgstr "Очистить конфигурацию"
+
+#: lib/indicator_sound_switcher/prefs.py:287
+msgid ""
+"This will remove any settings about devices that are currently offline, such "
+"as Bluetooth headphones or external sound cards.\n"
+"\n"
+"Do you wish to continue?"
+msgstr ""
+"Данная операция удалит настройки устройств, которые в настоящий момент не "
+"подключены, таких как Bluetooth-наушники и внешние звуковые карты.\n"
+"\n"
+"Вы хотите продолжить?"
+
+#: lib/indicator_sound_switcher/prefs.py:321
+msgid "Removed {} device configuration entries."
+msgstr "Удалены записи конфигурации {} устройств."
diff --git a/setup.py b/setup.py
index 42fedbd..de94a65 100644
--- a/setup.py
+++ b/setup.py
@@ -6,7 +6,7 @@
 
 
 APP_ID      = 'indicator-sound-switcher'
-APP_VERSION = '2.3.8'
+APP_VERSION = '2.3.9'
 
 
 def compile_lang_files() -> list: