Broken Project File

Unreal 4,10 Crashed (First time, quite impressed)
When I tried to boot my old project after a restart, the Unreal Project File was empty and prompt the following message when attempting to open from the launcher:

70629-bleep.jpg

How do I correct the Project file or make a new one? I’m still able to open the map files after closing the message and continue to work but i’d like to correct the project file please help!!!