Lost files

Been doing updates to an existing book file for a couple years, about once a week. Opened it today and all recent .scriv files have disappeared. Nothing exists later than 12/7/2012. Global search of the computer for .scriv shows the same. Have I lost all recent updates?

Is this something that has impacted your computer in general? I’m wondering if perhaps some kind of global backup restore was triggered, like a Time Machine restoration? There is nothing special about Scrivener projects. They are just folders with a bunch of files in them, just like any other folder with files in it. The only difference is that on a Mac they are set to act like a file, but that is nothing terribly unique either. Pretty much all of your software is operating under that same system—programs are just folders with a bunch of files in them.