Please Help, Windows Movie Maker Collections are Gone

[177ine177ine]

I had been working on a movie, and i had four collections full of clips from my camera that were all divided and named accordingly. Today, when i opened my windows movie maker, all these collections were gone and i seem to have lost all records of there being any collections. My movie file is fine and still plays but all my clips have disappeared from my collections.

How can i get them back
Please Help

 

[g-paw]

When I lose files I always search for the file name and if that doesn't work, I search for the file extension. I don't use Movie Maker so I don't know what the extension would be.