I had that happen at the office yesterday, just sat spinning and spinning, I used Windows Task Manager to close it down, rebooted and tried again, finally worked.

It's not a very satisfactory solution - meaning, this shouldn't happen - but it did work.  Thank you!

Same for me. It literally stopped and I could NOT "X" out. I also had to quit via "task manager".......

anytime weird stuff happens (with any program) that shouldn't but does, a reboot is the first go-to move to correct it.