TOC disappeared in RH7

My TOC appears to have gone "AWOL."  I was creating folders in my project files and moving documents around within RH when I got a message that said something like, "(Project Name) Default has been changed outside RH" and then something about "would i like to update the project with that change."  Since I had no idea what that change was, since i was IN RH at the time and certainly didn't do anything intentionally outside RH, i declined making this change.  And the next thing i knew, the TOC I had been looking at, was gone.

I've closed out of RH, i've rebooted my machine, nothing.  I have not recompiled, however...  Is there something i can do to get the TOC back without having to do it all over again?