How do I upload/open .tmx files in Trados Studio 2022? New to Trados, need help!

I have installed Trados Studio 2022 only today and cannot seem to upload / open .tmx files provided by the customer.

I have tried to download and install a plug-in which might or might not solve the issue but receive an error message every single time.

Needless to say that I am frustrated already (starting with having to use VM because Trados isn't compatible with Mac OS).

Can someone help me, please?

Thanks a lot.

Verena

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