Replaces file with a new file.
Useful to keep the file ID intact and the link more shareable.
Very useful to fix file if new file isn't all too different from original.
Disadvantages: Ratings might not be as applicable if bugs were fixed that made someone give it a poor rating.
O)FaRTy1billion -- I don't actually care, so I'll instead just sit in the corner of the room making mouth bubbles and rubbing spaghetti-ohs all over my face and hands.