Just get her to restore from her most recent backup. She does have a backup, doesn't she? If she didn't bother to backup, she doesn't have much right to be upset.
That it's bad form to be gleeful over others misery. Some people don't care about losing a bunch of files, for others it is a disaster. Yes, she should have had back-ups. But that's no reason to be smug.
Looking forward to your call for help about something.
Smug experts are of no use to any one, except themselves.