What to do if you have problems with a Windows Store app
If you or one of the users of a Windows Store app you’ve developed are having problems with the app, a good starting point may be the Apps troubleshooter that is available.
If you go to this page:
What to do if you have problems with an app
you’ll find some useful advice on what to try.
Also, down at the bottom of that page you see this with the link to launch the Apps troubleshooter:
Once launched it will guide you through:
After selecting next it checks some things and warns you that you may be required to restart:
Finally you will get to the summary screen:
HTH
Doug