I've gone through the documentation a few times and I can't seem to find information on post-processor selection.
I have a mill-turn machine and use it for lathe and 3-4 axis milling and use HSMWorks for my CAM.
The UCCNC software seems to work 'ok' running g-code that's been post-processed for Mach3, but I don't know if this is the best option.
It looks like HSMWorks has added a UCCNC post in recent development builds, but it's still very experimental, eg. the notes from build HSMWorks2016-R4.41148 indicate G28/G28.1 support has been disabled. G28 is one of those fundamentals ...