Deactivating Trados on old computer that doesn't exist anymore.

I use Windows on a partition on my MacBook. It crashed 2 days ago and I never managed to access it again, so I just deleted the virtual machine all at once and reinstalled everything from scratch. I can't access Trados to deactivate it on the old Windows, so how do I deactivate it now to activate it again on the new machine?
(I tried with the offline deactivation on Trados website, but it's not working).

Thank you!