Flixster’s free app with the lengthy title — Movies by Flixster, with Rotten Tomatoes — has upgraded to version 6.6. The update brings HD streaming to select titles. The app also features a brand new design for iOS 7. Flixster notes those who are having issues with streaming movies due to the update should log out and log back in to fix the problem. Navigon North America ($40) from Garmin has updated to version 2.6.1. As one might expect,…