Cannot start DeepL after upgrading with TradosStudio2021SR2_16.2.8.9097

Dear community,

After upgrading Trados, I cannot load the DeepL plug with the TMs any more. An error message says that an exception occurred with "System.Windows.ResourceDictionary.Source". I don't know how to uninstall the Service Pack and the downloads from RWS now only offer Trados including the Service Pack.

For some time already, Trados has warned me that I am using an "unsigned" DeepL plugin, but it had still worked so far.

I find the DeepL plugin very helpful and would greatly appreciate your help.

Knut