It was initially reported on the P3DV2 forum that VOXATC did not work, the symptom being the main display not showing. I had the same problem originally, but have now got it to work. I don't know whether it's my finger trouble, or a problem with the installer, but VAGauge and VAInfo gauges were missing from my Prepar3D gauges folder. Once I had done a manual copy from FSX, all seems to work.

I have now heard from the developer, who says that a P3DV2 installer will be included in the next release, expected in 1-2 months.