Not sure. I don’t see anything limiting the OS in the properties file that is used by Contributions Manager:
…although that file is from 2015, maybe a setting was added in 3.x that is missing?
Ah: When I uninstall TheMIDIbus it is no longer available for reinstall – I have to re-add it manually from the github download. Then it reappears in contributions manager.
Submitted an issue:
…although I’m not sure the library is actively maintained anymore.