Plextools Pro - Preferences won't save

Does anybody have this problem with Plextools Pro (currently running 2.05) that it does not save it’s preferences between different startups?

I have checked “Save Settings on Exit” (have also tried disabling and re-enabling), but my Preferences for Plextools pro won’t save.

I have also tried the “Clear Registry Settings” and re-applying all my preference settings, but this won’t help either.

Every time I close PlexTools Pro 2.05 it sets all the preferences to default settings, regardless of what I have set myself.

Any ideas? Re-install didn’t help me either.