Many problems after upgrading to Studio 2021

Hello,

After upgrading my 2017 version to 2021 I've encounter LOTS of issues and I'm not able to work with Studio 2021. I'm really considering cancelling this because I think it's the worst version ever.

- can't export tmx TMs as I could with 2017 so, most of my TMs lost
- CTR + Enter or CTR + Add does not work; it doesn't go to the next segment
- also, I'm not sure if it's related to the previous pooint, when I open a TM and work with it, it just doesn't update. So, if I translate the same text again, there's no match of that text in that TM
- besides, now I have a project from a client who always sends me the jobs with Trados (I see the package was prepared in Trados) and the only way I can open it in my PC is with memoQ?
And I've got very little knowledge of this program. These were the common things I used to do for my daily work which I'm unable to. I wonder what else is tricky or inexistant here.
Also, is there a way I can go back to my previous Studio 2017 version? Please!!!
Thank you for any kind of support. I'm desperate, I've got lots of work to deliver on Monday and I'm unabl to do it with Trados.
emoji