Uninstall deletes settings

[overheadhunter]

As reported here, the application settings are deleted during deinstallation:

https://github.com/cryptomator/cryptomator-win/blob/d3eda6ae8036d629b7783cfb3b98c1ad76558446/resources/innosetup/setup.iss#L60

Solving this issue might be in conflict with #3.