I was in the middle of editing a video when Movie Maker kept acting up, eventually causing my entire project to appear as green. I fixed the issue for a short time, but then the program got worse, so I resolved to exiting the program and restarting my computer. I do so, and when I opened up Movie Maker and tried to bring my project back into the program to further edit it, it stated that the file had become corrupted and wouldn't allow it permission into the application.

How may I go about fixing this issue?