PFD/MFD don't work anymore on ES Citation X Extreme V2.0

Hello, first off I beg your pardon should I have wrongly posted here, but I really don't know where else to go. I have already tried ES support forum but I didn't get any answer so far and after a brief search here, I found out that may simmers in this forum have the ES Citation X Extreme V2.0. Shortly I suppose there is a corruption somewhere because all of a sudden I'm not able anymore to turn on the PFD/MFD's over the dashboard. I follow strictly the manual but switches don't work as they did before.Of course I uninstalled and installed everything a few times with no joy. I even re-downloaded the software through my purchase key at Flight1, keeping my antivirus inactive, with no positive results as well. Moreover, now if I hit Shift-1 key, to view the 2D panel, FSX crashes to desktop. All that's following happens both through a Cold&Dark start up that through systems already online: please, take note of the bitmap among radio system and APU console Switching Bat1, bitmaps change and the left radio panel is turned on Then, after having engaged all the other systems, with the avionics switch full up, the PFD and MFD over the dashboard stay silent: Thanks for you attentionCheersManta