wont start

In my musescore 2, my start up menu comes up but I cannot load any scores the window just wont pop up, it is there in my pin bar but when I press it nothing shows on screen. This was not a problem a few days ago, but then it started and now none of my scores load, I tried repairing it and deleting it and re- downloading musescore, but nothing works I continually try and nothing happens. Pls fix! Musescore is my favorite music notation!