Playing Dungeon Rats. I defeated Democritus (spelling?), the guy with the big hammer and got his key. Went through the area behind his lair and defeated the Scolopendra and got the module that seems to have liquid fire. Went back to camp and the only option besides the way I came in is to take the elevator to Old Town. When I get there I cannot take the elevator down. First time I entered there was a narrative text saying something like "The elevator operator is missing. It's hard to get good help". I cannot find any other paths to continue the game. Where do I go or what do I need to do?

I can't recall right now but if you would provide a save file it would be easier to help you. Alternatively you could ask on devs forum: http://www.irontowerstudio.com/forum/index.php/board,50.0.html