I just bought the Z-Wave GoControl QuickStick Combo. Before I plugged in the stick, I installed the Silicon Labs VCP driver kit on this page: http://www.indigodomo.com/silabsurl
After reboot, I do not see any of the documented serial ports available in the "enable z-wave" setup tool. There's nothing to select except a "usbserial" device, which is not it and causes indigo to throw errors.
I'm on Indigo 7.2.0 and mac OS 10.10.5.