Zwift App stops responding on exit in Windows 7

This has been happening for a couple months now repeatedly. When I finish my ride, everything seems fine until I exit Zwift. Windows issues an error message saying Zwift is no longer responding and then I have to force closing Zwift in the error window. Interesting that the the ride seems to get saved in Zwift as well as being uploaded to Strava. So it’s really not a big deal, just doesn’t seem right - plus it never used to happen. Nothing’s really changed on the PC I’m using. I tried uninstalling and reinstalling Zwift but that didn’t correct the problem. Any ideas what’s wrong or how I can fix this?