restore a file to a previous date

i had problems with saving a movie with movie maker but i don't blame it... my movie is like 4 hours long. but before saving it by splitting up into different parts, the lazy part in me decided just to like it save in a low quality format and then up the quality later on (no idea what i was thinking, it was late at night). unfortuantly this morning when i double checked that everything was alright, i realized that things like certain captions and parts i had fast forwarded were playing at 1x speed (instead of 2x or 3x), which caused music to be delayed. as i really didn't want to edit this thing again (took me a week) i tried using file history, which i just turned on, to try to restore my movie maker file to a previous date (the movie maker file was saved as i closed the programs, causing all of these changes to be saved as well) but file history just says: We can't find your folder. so is there any other way i could restore this file to how it was yesterday? just saying i do have an external hardrive but the moviemaker file it backup was overwritten as i saved mine last night as my external hardrive continously backs everything up -.-