in the message, there is a link that points you to your sketchup account.
there, looking at your products, you will find sketchup pro (among others)
you can deauthorise all machines there.
Then, all you need is to log off, and log on again.
As of the “force quitting” thing, you mean crash ?
I’ll assume your profile is accurate, are you using the lastest macos sonoma 14.3 ?
do the crash - by any chance - all happen when you’re using the material tool ?