LivePRO USB, though NOT free, is a VERY cool addon for the FB3! (The download won't work without the hardware-specific license file).
As Anthony mentioned, it doesn't support DMX output (which the FB3 doesn't support), but beyond that, it does virtually everything the "standard" version does that is listed on the Pangolin webpage (and it's cheaper than the standard version!). If you're interested in LivePRO USB, contact Bill on the Pangolin webpage...
There's definitely a learning curve to the free LAStudio software for the FB3 (as with any software package), but remember that in addition to the show-control software, you're getting some very powerful 3D and abstract generator applications for free!
AND...
as hinted on other threads, there are going to be some FB3-compatible changes coming from Pangolin BEYOND the horizon......
RR
Metrologic HeNe 3.3mw Modulated laser, 2 Radio Shack motors, and a broken mirror.
1979.
Sweet.....