Cant open Synthesizer or Mixer
This has been happening for a while with the synthesizer, but I hardly use it, so I wasn't too worried. However, the problem just recently occurred with the mixer, and I ALWAYS use the mixer. Any help would be much appreciated. I have tried deleting musescore and reinstalling, and that worked for a while, but for some reason it doesn't any more.
Comments
Try:
https://musescore.org/en/handbook/revert-factory-settings
Regards.
FWIW, probably you accidentally moved it offscreen. And probably it's only "mostly" offscreen but still has one edge visible. I don't think most OS's would allow you to move a window *completely* offscreen. So try looking at the edges of your monitor. However, if you have changed monitors (or monitor resolutions) since the last time you opened the window, that would be a way of tricking the OS into letting you move a window offscreen, so maybe that is what happened?
Anyhow, if you don't still see an edge of the window along the edge of the screen, then indeed "Revert to factory settings" should fix it.