Studio 2019 reinstallation issues

We have large projects and the deadline is tomorrow.  We had to reinstall Studio due to not being able to see Project List when opening Studio. It was just a blank black box but nothing, no project list.

I was told uninstalling and reinstalling will solved it but now I can't se.e certain files.  there might be a reinstallation issue

Once I downloaded Studio 2019, I noticed that there were only 2 files in App folder vs the 4 that existed before.  I also use Termbase files and need help setting this up properly.

Files are too big to upload through this support ticket.

Can you help?