the past day I did unistalled Android Studio because after I did close a project it prompted me something like "Do you want to unlink/delete the 'app'" or something similar, of course, I said YES, and after that when I tried to open back any project of mine it first says it doesn't have the SDK 22 installed, after installed it just opens a new Android Studio windows but.. blank as the previous one, even if I rebuild the project it does the same thing: it keeps itself blank.
I do not know what to do, I did reinstalled it like 4 times so far!