I installed P3Dv4, and for some reason the default CRJ 700 is gone, when I try to set another default model (it scans it, and says it there) it says "The specified default model was not found during the last scan of your installed models. Please enter a different default model." It reads 48/48 models, but no matter which model I input into the box it says its not a valid model. Quite frustrating.