dunno...haven't had that particular problem. is it only deleting garnet, or all of the programs you've installed? garnet has the nasty habit of crashing and deleting everything if you run a program it doesn't like. i back up the file ~/.gvm/.gvm_store (or something like that) to an sd card once i get everything like i like. when it crashes, you can just copy your backup back to the .gvm directory.