On rare occasions, the Sugarmate Glance Mac app may get into a state where the Login window won't appear. To fix it, follow the steps below:
Fully remove Sugarmate Glance and re-install it
On your Mac
Uninstall Sugarmate Glance by opening the Applications folder, then drag the app to the Trash
Open the Finder
In the menu bar, click Go, then click Go to Folder...
Type "~/Library/Containers", then hit return
Delete the "SugarmateGlance" folder (or "com.wildvillage.SugarmateGlance" folder)
Delete the "SugarmateGlanceHelper" folder (or "com.wildvillage.SugarmateGlanceHelper" folder)
Open the App Store and reinstall Sugarmate Glance