iFolder 2.1.6

I have a user who "lost" an entire folder of very important files.
We're not sure if she deleted the folder (unlikely) or that iFolder
did something bad.

In any case, I've followed TID 10068988 and restored her entire
iFolder directory to a temp location. I then copy all of the files
into the running iFolder directory and the iFolder server promptly
deletes EVERYTHING except control.dat and dircon.dat.

Any ideas?