I've been having some issues too. I also cannot see any illuminated indicators for the audio monitoring channels. I can monitor Com radios, but don't hear any morse identifiers on the Nav monitor channels. I haven't verified if I can transmit. The RXP GPS was pretty grumpy to get initialized for the first time but has settled down after I forced the use of the default Laminar GPS, and then tried the RXP again. This is probably is probably not a high priority issue, but I observed that when I use my Plane Command voice triggered copilot software some of the commands associated with the avionics were ineffective. I installed the aircraft from a fresh download today. The MU is a brilliant flier, I like her a lot!