I had never previously played DS. The original came with the LOA version, so both of them were just installed. It put the saved games under My Documents, and I copied them to the other save directory under the game itself, but that didn't help.
It seems like the game thinks I have no save files because when I exited I didn't tell it to save right then and there. Of course, it's Microsoft, so that shouldn't surprise me

I couldn't find any patches listed for LOA on the Microsoft site. Do you know of any?