It won’t be usable for bypass parameter, as Control Change (or maybe Note On / Off) type messages are needed for controlling parameters. Program Change messages are useful for changing presets / pedalboards.
See Program Change on a Specific MIDI channel for info on how to change which channel MOD software listens to.
If you’re using the latest MODEP version from the latest Patchbox OS image published just yesterday, the important MODEP paths have changed, user config files are now in /var/modep and the python source code is now installed to /usr/lib/python3.7/dist-packages/mod-ui (this is from memory, it could be a similar path)