Not Timo, just another end user - but I am having no trouble at all with this. One of the first things I always do on installing new versions (be they full installs or patches) is to move all the prefs from Users/username/roaming/appdata/steinberg/Cubendo x to prevent the new install from using older versions to build it’s prefs. Then I will set everything up from scratch - seems to solve most issues.
If I had your issue the first thing I would try is trashing the prefs completely, remove (temporarily) the prefs folders for earlier versions & rebuild those suckers. Once this is done you can then put the old version prefs back again & all should be clean - often, porting prefs from older versions will cause issues for some reason.