MAXR should follow XDG Base Directory Specifications on Linux.

https://specifications.freedesktop.org/basedir-spec/basedir-spec-latest.html

It's currently using $HOME/.maxr/

This is bad practise and is part of the problem of home folder pollution on Linux. Even as hidden folder. I counted my folders today to report this to another game developer, that did not even bother to use a hidden folder. Got 48 game related folders in my home folder making it hard to find my own stuff burried between all that noise.