[Resolved] Map Tree Data Corrupt (RM2k3)

For some reason, yesterday, I was on RPG2k3 and it was working fine. But today, when I opened it, I noticed the project was closed even though I didn't close it. I tried opening the project, but it brought up a box saying "Map tree data is corrupt." I tried opening other projects and they worked fine. But I was working on the one that won't open. What can I do to fix this?

Bump?

You can't. Unless you have a backup, you're pretty much screwed.

Really? Ah well.... I can do the stuff again. Not that much on there anyways.