Unity 2018.2.1f1 won't open projects

Well, as of earlier today, Unity has been unable to open any projects.

–I updated from 2017.2.1f1 to 2018.2.1f1 to see if that helped, but it didn’t.

–Letting it sit for a while does nothing.

–Trying to open other projects also doesn’t work.

–In the task manager each of the Unity Editor instances shows 0% CPU and about 300MB of RAM.

–I’m using Windows 10. I can provide specs if needed.

Honestly I have no clue what happened, so thanks in advance.

I would suggest unplugging your new controller.