I've had the same problem with my video projects not being recognized and recoverable from a folder I have for my VP (.vpj) files. I am unable to pull in the project and continue the job from the .vpj files. It simply doesn't find them. Lost work! I read all of the other complaints and replies for fixing but I will I need to carefully save the work in some other way? . As I edit and develop my project I always SAVE PROJECT. I assume this saves EVERYTHING that I have done thus far.
I'm thinking of saving the project as .MP4 and work with that format. Frustrating problem. I hope this problem can be resolved. Many of us like your products.