My paid licence Studio 2015 turned into a 30-days test version of Studio 2015

My paid licence Studio 2015 turned into a 30-days test version of Studio 2015

 

I updated Windows to Windows 11, and Trados Studio 2015 had to be reinstalled, and I deactivated my license and downloaded Studio 2015.

After having reinstalled Studio 2015, I clicked on the Trados button, and a 30-days test version appears instead of my full version of Studio 2015 corresponding to my licence.

What do I have to do in order to get back my full version?

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