AvioApp runs on it's own computer and monitor (the system requirement is very low... just a 1-GHZ machine with 512 meg of RAM and 16 meg of VRAM is just fine) and represents an Avidyne PFD or MFD when hooked up by ethernet cable to another computer running a copy of X-Plane.
In X-Plane, simply enter the IP address of the computer running AvioApp in the X-Plane Data Output screen and X-Plane will drive the high-accuracy Avidyne PFD or MFD in AvioApp! If you want, get TWO extra computers and TWO copies of AvioApp and make one of them the PFD and the other the MFD! X-Plane has no problem driving 2 copies of AvioApp.
Using AvioApp, you can finally have a very high-fidelity, high-res, stand-alone monitor for the Avidyne PFD and MFD running with X-Plane. The accuracy and ergonomics are great for flight-training!
Right now, the interface to AvioApp is mouse-driven... the knobs and line-selects are hi-lighted in red. In the near future, we will have hardware bezels so that the interface to the PFD and MFD are exactly the same as the real airplane!