A week ago I was working on Studio 2021 and got a message telling me there was a new update. I accepted it and, all of a sudden, all the projects disappeared from the project list. As this wasn't the first time something like that happened, I continue working and tried to open an old project. The list was still blank; I could open the file from the Editor tab though. I tried to open several projects and packages (old and new) and I received the same message: "This project is already open", but the list is always empty. As a result, I can't continue working on Studio 2021, as I can't select any projects, see their related info, etc.

Why is this happening? Thank you!