Map editing help

Hi, i have added many custom areas to my taviana 2.0 map and i have just come across a problem.
I use 3de_conv to convert the .biedi file to .sqm file and when i have just attempted to convert another file i get "3de_conv has stopped working" and then the program closes. Can anyone help me out here please as ive just spent a good few hours editing the map and it looks like i may have to start again unless i can find out why the program keeps crashing.

Many thanks

Termy