apc3

The MKII Express doesn't work WITH your UX2, it's only a midi controller and works with software, like Amplitube BIAS or PodFarm. I find it works great with all three programs. You will want to download the software (FBV Control) in order to change how the pedal is configured. The MKII will be plugged into your computer through USB and consider it as a separate piece of equipment, because it is. Last, but not least, the MKII Express and Shortboard are MIDI only, so there would be no audio outs, since it is only a controller and produces no audio itself, the audio would still come from your soundcard, in this case, from your UX2.

I have the FBV MKII Express and use it with windows 10, using Bias, Amplitube, and POD Farm. I also bought a powered hub and used it with my iPad Air 2 along side a Apogee Jam 96k for input. Probably one of my best/most used purchases last year. Just make sure you download the FBV control software, you'll need it. I find that it is very easy to change parameters and lets me save and name preset configurations. I may just buy the shortboard this year. Good luck.