Hi Jan,
the xattr errors shouldn’t be anything to worry about.
Since the program starts running, it seems as though you’ve successfully got it out of quarantine.
It looks like there might be an error with your Preferences files for some reason. So I would first of all suggest that you remove or rename the .ccpn folder in your home directory (/Users/username). In a terminal the command
ls -a
should list all the directories starting with a . which are otherwise usually hidden.
You will probably have to re-register, but that shouldn’t be a problem.
Let us know how you get on.
Vicky