2017 Will Not Close

I'm running TS 2017.  I keep Timeslips Today open.  At the end of a day, I can save the slip I've been working on.  No problem.  But, manyof my panels in TS Today will be blank or will show No Data Selected.  When I try to close all of TS or even just TS today, nothing happens - from menu or from the X.  Task manager shows it is using CPU resources.  I can wait hours and nothing changes. I can actually use all menus and run reports, etc. Just cannot close the program. I have to force close the program.

Any guesses?