save only the TLM filename instead of the whole path

[jmbhughes]

Solves the confusion between whether a file exists.

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 89.60%. Comparing base (67ef92e) to head (36a021c).
Report is 2 commits behind head on main.

Additional details and impacted files

@@           Coverage Diff           @@
##             main      #85   +/-   ##
=======================================
  Coverage   89.60%   89.60%           
=======================================
  Files          16       16           
  Lines         760      760           
=======================================
  Hits          681      681           
  Misses         79       79           

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