I didn't think something like this existed, but it's awesome. We have a client who updates files somewhat frequently and were worried about having several versions of a file on their site (and linking to old versions).
Haven't used extensively yet, but this plugin is awesome so far!
NOTE: It would be really awesome if there were an option to make the second option the default if that's what you want your clients to do. Or even to hide either option if needed (just to make it fool-proof for handing off to clients).
Thanks for developing this!