Trying to deactivate Trados Studio 2024 Freelance Edition offline. Getting error.

I can't start Trados; it won't load. I guess the problem is in the AI plugin I installed. It worked until I closed Trados.
According to the information on some forums, the best solution is to re-install the program.
But for that, I have to deactivate my license.
As seen in the video, my Trados has to be up and running if I want to deactivate the license.
What kind of "offline deactivation" is if my Trados has to be "alive"? In that case, I can deactivate the license online.
I also got an e-mail with an offline deactivation ticket. After I pasted it into the box Deactivation Certificate, I got an error:
An error has occurred with your offline deactivation.
So, how can I deactivate the license if Trados is on strike and won't work with me?
Thanks for your help/suggestions.

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