problems activating Trados Studio 2021 after Windows 11 upgrade and changing name of my computer

I recently upgraded Windows 10 to Windows 11, and I changed the name of my computer to desktop instead of DESKTOP-(with a number of letters and numbers afterwards).

Now there is a dialog box that appears when I open Trados Studio 2021 saying that my license expired even though I have a perpetual license.

How can I deactivate my license online and get a new activation code?

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