Hmmm, must have accidently written over the mine sweeper at some point. It should be available to all races once they have particle weapons and mines technogies (and generic light weapons iirc). It is actually a particle weapon that can be used in combat as well as to clear mines during movement.
The latest update should help with that - it includes all modifications that have been made since the May 24th post.
Update062902.zip
It does not include the incomplete races (Abbai, Drazi, Vree, Brakiri, Technomages, Raiders, Dilgar, Drakh or Pakmara)
Gil's shipset and AI will be posted seperately once I hear receive the complete set.