I really hope this hasn't been addressed before. I took a look around the forums and didn't find anything addressing this, although it might be related to not being able to load more than 15 mods (are new scenes considered mods?)

Anyways, just as the title implies, I can make or edit new scenes in the scene editor - I can even play them, but as soon as I exit the game (exit to windows), the scene completely disappears from the list. This didn't used to happen. My best guess is that somehow, my installed mods are causing the problem. I'm fairly certain that simply reinstalling would work, but if at all possible, I'd like to get it to work -with- the mods, as I use the mods primarily for scene-editing. Plus it would be a pain to integrate all those mods into the editors again. Anybody else had this problem or know of a solution? Thanks in advance.

Windows Vista 64x
Installed mods:
Darkstar
Bunker Module Pack
Map pack III

Same thing happens to me. I was thinking the exact same thing too, about the mod capacity causing this.

I've downloaded and installed about every mod on the first page of the 'Mod Releases' section. That might be it.

EDIT:

I managed to fix this! atleast, for two of my best scenes...
I added an to the scene I used as a base's Index.ini file.