Geany 1.36
the filedefs from the user folder never get loaded.
tested this.. open: Tools > Configuration Files > filetypes.common this file is stored in `Users\USER\AppData\Roaming\geany\filedefs` all lines start with `#~` file can be edited and saved, but no change in the UI, neither through reload nor restart.
when one digs into the application folder at `Program Files (x86)\Geany\data\filedefs` and changes file permissions so a user can edit them, then any change gets picked up by the program.