Installed and licensed Studio 2022 and then installed Studio 2021, cannot license Studio 2021 after the fact

Hi, I'm in a similar situation as these two threads:

 Trados 2022 activated on new laptop, but not 2021 

 Upgraded from Trados 2021 to 2022. After formatting the computer, I can't activate the 2021 version, only Trados 2022. 

After receiving a new laptop, I installed Studio 2022 hoping I wouldn't need 2021 anymore. This was fine until I realized that the Embedded Content XML file filter had been removed from 2022 and I need it to update file type settings on our version of WorldServer.

Installed Studio 2021 and it won't license. I tried deactivating my 2022 license and applying it to 2021 but of course this didn't work. Reactivated 2022 without problems. Still in 2021 trial but I need a fix as my trial is running out!

Thanks for any support!

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