I was Just sitting on my computer trying to make a game and I accidentally hit the "Restore" up in the top left corner and now the Window for Quest cannot be clicked on to be brought up or seen, I tried to restart my pc, uninstall quest and reinstall but it seems nothing works. If anyone has a solution or anything, Thank you.

It's possible that the window is there but off the edge of the screen. That was a bug in Windows 95, and I know that the same problem happened in Windows 7… so maybe it's still not been fixed.

The workaround on older windows versions was to press Alt+Space and then hit 'M', then tap the arrow keys until the window appears. Alternatively, right-clicking the taskbar button would allow you to maximise it again but only for some applications. I don't know if either of those solutions still works, but they're probably worth trying.

Oh my god it worked! Thanks mrangel!