Add the containing folder of this script to your PATH and mark the script executable if necessary.
$> LayerExport.py --help
Options:
-h, --help show this help message and exit
-i FILE, --input=FILE
input file to process
-o OUTDIR, --output=OUTDIR
output directory
-k, --keepsvg keep svg file
-d DPI, --dpi=DPI specify resolution in dpi, e.g. --dpi 90
-v, --verbose enable debug output
If this script is in the PATH variable und does not recognize any Argument which was passed head over to the Windows Registry (run -> regedt.exe) and look for the open-with association of python.exe. It should read something like this in order to forward arguments from the command line.
Where i found this: Stack-Overflow Thread