the one on steam is the latest stable one. that feature you had must've stayed when you updated it whilst it actually was removed. 3draven is optimizing te game now and making it more stable and once he did that he'll send it to me and i'll look at stuff i can do to optimize it here and there some more for mac and then i think the plan is to send it to wolfire. then wolfire decides what to do with it.
I've since moved to the more stable modded version (with more weapons). It has a few fixes that were wrong in the source from Github (fixed missing scripts + weapon springs and recoil work ok). The game will feature the extra guns.