Mine has done the same thing. All I did was go to the folder where the .exe is and created a new shortcut to it on your desktop. Then launch it from the desktop. If that does not work, try to launch it from the .exe from the main folder. Fixed mine, and did not have to reinstall. Try it out before you attempt to save all your scenery/aircraft/setting files and reinstall.....could save you alot of time.