Movie maker glitch

I saved 2 copies of a project in case something happened. I just finished adding about 100clips to a 5 minute project and i was trying to split one of the clips and when i clicked it all of the clips dissapeared. I tried to restart my computer and the app and when I opened the project nothing was in the right hand editing side and I could watch a preview of the five minute video but the screen was black and there was no sound, only text. I could scroll through on the right hand side but it was all white there were no thumbnails. So I opened up the other project that I saved, the copy, and I could edit it for about 5 minutes and then the same thing happened. I tried to open it again and it said the file was not compatible with Movie Maker.   I have copies of all the clips on my computer and the project was only done on this computer. Please help