Cannot deactivate license in Trados Studio 2021 Freelance Plus

Hello,

I am using Trados Studio 2021 Freelance Plus. Yesterday, I renamed my PC in Windows 10, but did not realize that it might affect the Studio, so I did not deactivate the license before. When I run the application after that, I had to activate the license and now I have two licenses active. I tried to deactivate the former license offline by following the procedure at https://docs.sdl.com/813470/587404/sdl-trados-studio-2021-sr1/deactivating-your-product-offline-with-a-single-user-license. I selected the Can't deactivate online? - Deactivate offline link and got the deactivation authorization. I opened the Product Activation dialog in Trados Studio, selected the Deactivate offline link, but when I copied the deactivation authorization and pressed the Generate Certificate button, the message was displayed: "Failed to activate offline. The specified deactivation authorization may not be valid. Validate your deactivation authorization against the authorization in your SDL account". So I cannot paste the deactivation certificate under the Offline Deactivation Certification in my SDL account (the activation state for this license is "Deactivation initiated"). Now, I do have an idea what to do next.

Regards

Arek