Some people seem to encounter an issue after upgrading to Mavericks. Removing the preferences file for Mental Case seems to help this.
Try the following:
- Quit Mental Case
- In Finder, choose Go > Go to Folder...
- Enter this
~/Library/Containers/com.mentalfaculty.mentalcase.mac/Data/Library/Preferences - Locate the file called
com.mentalfaculty.mentalcase.mac.plistand drag that to the Trash. - Restart your Mac.
- Launch Mental Case and see if that fixed it.