Recovering lost library folders?

Hello,
Recently I was working on a .fla project when suddenly (I don’t have any clue what happened) My entire movie clips folder was deleted from the library! Those clips took quite a long time to make and I do not have a backup file.

** I have two questions: **First, if they were deleted or moved or something…is there a place I might be able to recover them from?

Secondly, if that would not work, is it possible to convert an .swf back to a .fla to recover some of the clips?

All helps is immensely appreciated.
Thanks!
-Daniel