Mitch v1.2.5 brings a new small feature, which brings it one stop closer to being a Google Play clone:

• You can manually check for updates from the Library tab. No longer will you have to wait for your daily notification!
  • For now this is very basic: just one button that starts the update check. Later, I will add a menu with details about what exactly needs updating, etc.
• (Possibly) fix issues when Mitch is updating itself
• Fix bug with web games: leaving and re-entering an activity with fullscreen game stops it from being fullscreen
• “Update available” notification for non-APK downlods will now display the file name
• Slight performance improvements