A message stating Mental Case is damaged is appearing
Very occasionally after you download a new version of Mental Case and try to launch it, you could get a message that states that the app is damaged.
This is not a bug in Mental Case, but a problem in the Mac OS X security measures.
To fix this, try first dragging Mental Case to the Trash, emptying the Trash, and then re-downloading from the Mac App Store, and restarting your Mac. (Your data is not stored inside the Mental Case app, so it will be safe.)
If that doesn't help, open the Terminal utility (in /Applications/Utilities), and enter this command
xattr -rc "/Applications/Mental Case.app"
Then launch Mental Case
Studies for macOS and iOS
Mental Case for Mac OS X
Mental Case for iOS