Argh, that's frustrating. That's been my default (uninformed) state -- those flags files never seem to work for me. I override launchers all the time. I've fou

Argh, that's frustrating. That's been my default (uninformed) state -- those flags files never seem to work for me. I override launchers all the time. I've found some comfort by placing my edited copies in ~/.local/share/applications and informing 'fuzzel' (my launcher) of it by ensuring the parent directory is in $XDG_DATA_DIRS As long as the file names match those in the 'system' directories, these will win.