Upgraded from version 14 to Photoshop and Premier Elements 2021. Have 36,000 photos and movies in catalog going back to 2003. Products installed amd activated without errors, updated catalog no errors.
Organizer shows thumbnails correctly. PROBLEM: Headers "file, ...view... create... share" are visible but the box around each of them has no bottom stroke. Cannot click on any of them.
FIX: My screen resolution is 1280X1024. With WINDOWS screen size set for "full" (the "-", "[]", and the  boxes on top of the windows screen. The top of the adobe organizer window is partially cut off. SOLUTION: set the window for "[]" and resize it to move the top down a tiny bit. Now the boxes areound "file..." are complete and you can click on them. As a side note, "Create" and "Share" will now also work.