This freeware name (Restoration) makes me remember my old RPG gaming days! What this free software do is that it helps you restore recent accidentally deleted files - either you empty your recycle bin accidentally or by Shift+Delete a file. It doesn't guarantee that it can find all the deleted files, but I had managed to restore my "Scary Movie 4" movie deleted clumsily by, umm.. me. That explains that it can work sometimes.
I can't guarantee that this freeware will help you restore all of your mistakenly deleted files - but it's worth a try, isn't it?
Download it from http://www.geocities.jp/br_kato/