I have found some document about it, but it referred to Lytro.lytrolib as if it were a file - I see it's a directory... Also I seem to remember that while Lytro Desktop 1.0.1 "Readme" popped out before the install, one of the lines mentioned an "ability to backup the database".
I just ran a "backup" from command line (better comfort level for me) - I think it will work - but if I can backup just "part" of it, or there's more detail on restoring - as in what specific files, please let me know.
Keep in mind this test was on my VM, I will also use same method on my friend's Mac at work.. although I consider that one at "less risk" of corruption.
Anyhow, here's what I ran:
cd "wherever u
MADE SURE LYTRO APP WAS NOT ACTIVE
want to put your backup tar.gz file"
tar -cvzf GT_LytroBackup-20120421.taz /Users/username/Pictures/Lytro.lytrolib