Raidionics stores downloaded models and temporary stuff in a directory called .raidionics/, which is created at installation.
However, when uninstalling the software, this directory is not deleted (at least not on Windows).
For Windows this can be solved by adding this into the uninstallation procedure in the NSIS file (.nsi), but this fix does not work across operating systems. There might be something one can specify in the .spec file(s) relevant for building the executables?