Sorry, can't try this. I'm using Mac AppStore versions only.
Currently, as a workaround, I just
disabled iCloud synch for all Cookie app versions (5-7) on all devices,
reinstalled the App
imported B/W lists
and set up all favorites manually.
So the app is running fine (without) iCloud synch, until the problem is solved.
Also, it feels a bit like getting an idea of how it came to thist trouble and where to locate it. Sadly, I'm just too tired to take the time for further explaination. Had a heavy day. But I'll keep you on trac, when I can describe it a bit more detailed - either the problem or the solution, if appliable, or both.
Finally, it's not essential any more, since it workes fine w/o iCloud synch.
Thanks anyway for your great job!
K.