Necla Cin

If your question is about upgrading Studio from 2019 to 2021 then please follow this article: https://gateway.rws.com/csm?id=kb_article_view&sysparm_article=KB0039975

If your question is about can you use your google API key (v2) that works in Studio 2019 for Studio 2021, then the answer is yes.

Please take note, if you are using MT Enhanced Plugin for Trados Studio, the app version is specific to the Studio version. 

So for 2019 you need to use 4.3.12.0
For 2021 you need to use 5.4.0.0

Download to installers can be found here https://appstore.sdl.com/language/app/mt-enhanced-plugin-for-trados-studio/604/

I hope I understood your question correctly

Lyds

Necla Cin

If your question is about upgrading Studio from 2019 to 2021 then please follow this article: https://gateway.rws.com/csm?id=kb_article_view&sysparm_article=KB0039975

If your question is about can you use your google API key (v2) that works in Studio 2019 for Studio 2021, then the answer is yes.

Please take note, if you are using MT Enhanced Plugin for Trados Studio, the app version is specific to the Studio version. 

So for 2019 you need to use 4.3.12.0
For 2021 you need to use 5.4.0.0

Download to installers can be found here https://appstore.sdl.com/language/app/mt-enhanced-plugin-for-trados-studio/604/

I hope I understood your question correctly

Lyds