That file stores your settings and has to be updated, so I can't really include that with the game. It would just include my settings. The settings file is rebuilt from your save file if you don't have one in a normal installation. If it does somehow cause issues with joiplay, that's kind of unavoidable.
Either way, people have reported successfully playing it on joiplay, so I can't really speak to whatever makes it work or not beyond the things I've posted, but I know it can work.