Chapter came up empty

I’m using Ubuntu One (sync application) and after formatting a chapter at work yesterday, discovered that chapter was empty when I opened scrivener this morning at home.

Can anyone walk me through how to safely recover that from one of the backups, and copy it back into my project? The directory structure and backups look a bit cryptic and I’m a bit nervous I’m going to make more of a mess of it.

I was careful about making sure I manually saved, and then exited, and checked that Ubuntu one synced before opening the project on another machine. I’m confused at how this would happen in the first place. Does anyone know of issues with scrivener saving projects properly?

muddled through it, got my chapter back. Spent a hour re-writing that chapter, now it’s gone again.