Well, thorneven, while the LED of the Tunings knob does glow blue when you've changed a tuning ("virtual capo") on that setting, that's not the green LED on the Model Select knob/switch that I saw.
I did notice that when I unplugged and replugged the guitar's VDI cable that the magnetic pickups then stayed on the whole time, even when I was playing a modeled guitar. Only by reinstalling the 1.7 firmware and then updating to 1.9 solved THAT issue. (Stepping back to 1.8x didn't solve that problem.)
So, as far as LED colors, we know:
Steady WHITE = Model Select (Audition) Mode
Flashing WHITE = Customization Mode
BLUE (on tuning wheel) = Saved alt tuning selected
Flashing RED = Reset Mode
GREEN = ???