iMovie video files

Okay, my issue is as follows: I was re-organising files and folders when, without thinking, I moved some video files into a different folder. Because of this, many of my iMovie projects displayed errors that they couldn't find the source file. My question is, is there a way I can point the project at the new folder, or find out the location that it thinks the files should be in?

Edit: Oops sorry, just noticed the wrong forum…