So, for some reason, all the frames at the end of your scene 1 have been deleted, which messes up the structure entirely.
The move frame, the psyche locks end frame, and the scene end frame are all gone. So the editor no longer knows where the place ends, hence why it deletes everything.
Now I have to understand why it happened... and I can't reproduce that on another trial yet, though I've tried a bunch of stuff. It's a good thing because it means it's probably not a very frequent case; it's a bad thing because I can't find the real root cause of the problem...
Again, if you have any pointer as to what you did in this trial that could have led to that, it'd be great.
First, I see that your auto backup from 13/04/2014 - 02:53 (UTC) did not have any problem, but the following version does. This means the modifications you did at that time broke the trial data.
Do you remember what you did ? More specifically, what did you delete in there ? Talk conversations ? psyche lock conversations ? A full scene or CE ? Or just regular frames ?
Such a bug is likely related to a bad computation of the range of frames to delete in some case, so it'd be very helpful if you help me find which specific case is concerned
I guess I should also work on some basic sanity checks preventing saving when such errors are present...