I know this question has been asked before, but I cannot quite figure out how to solve the problem.

I know this question has been asked before, but I cannot quite figure out how to solve the problem.

Hello Tamaki Iwamoto
You need to reopen the project in Trados on the new computer as the settings / projects list are not transferred automatically.
If you didn`t copy the projects on the new computer please do that and then open them in Studio. On the old computer the project can be found in this location (if you didn`t saved them somewhere else): C:\Users\%Username%\Documents\Studio 2021\Projects
Thank you,
Sorin