Hello Tim, I've got a new twist on this for you.
I downloaded the 2 new installers for the P-38 and the YF-23 last night. Installed the P-38 and everything worked great. GNS, exterior and interior lights, dissappearing yoke all good.
I then installed the YF-23, this is where it went bad. I had no MFD's displaying in the aircraft. It got worse though, I lost the GNS 340 in the Red Bull version, the MFDs in the stock F-18 quit working, the Garmins in the default Cessna and Mooney stopped and the Garmins in my Quest Kodiak gave up the ghost too. Yikes!
I uninstalled the YF-23 and all systems are go again in all planes including the retored P-38.
Stats;
FSX w/Acceleration
Vista64
UAC disabled
DirectX10 enabled
FSX installed on it's own drive.
P.S. - both wing tip lights are still green.
Thanks for you attention.