Could you give exact settings you are using? Sure, have you tried, just making a map from scratch, with the editor?
You know, map size: Immense
player race: Custom
opponents: Nine with Eight Minors
options: Mixed between rare and abundant
etc.: NO MODS USED. Disable the mod folder. Some mods will add corrupt data (won't work in the editor) to map file generations.
All my saved maps crash the editor immediately. The map editor uses only the basic ship set. Any funky designs will throw it for a loop as it uses ONLY the default ships. Try creating a map in ToA and save it. Then try editing it. There are problems going between ToA, DL and DA. I beleive with this editor you will have to "backward" edit any maps for DL and DA.