Quote:for anyone else reading here the location for Win10 is
C:\Program Files\GIMP 2\lib\gimp\2.0\plug-ins\Change menu & icons\Change menu & icons.py
It should not be necessary with a regular Gimp installation to use the Gimp installation plug-in location. Possibly a result of installing as Administrator resulting in the user "unable to save the file".
The place to install your own plugins is C:\Users\"yourname"\AppData\Roaming\GIMP\2.10\plug-ins