Recently purchased this product, and with some difficulty installed it. It runs fine but there after P3D V3.4 does not. Apparently this aircraft somehow corrupts the files in C:\Users\Tom B. Headley\AppData\Local\Lockheed Martin\Prepar3Dv3. Unless I delete the two or three files, P3D will no longer run with messages of corrupted files and scenarios. No other aircraft, and I have plenty, performs this wonderful feat. Any suggestions? Oh, I use VR Oculus, but I think it does the same if I don't.