Here's what I did... step by step. Let's see where this goes. Not wanting to re-install my Liveries and thinking that the possible changes would be to the AIRCRAFT.CFG files, I...

1. Copied all of the NGX's from SimObjects/Airplanes to my empty Drive E:
2. Then I copied and renamed all the aircraft.cfg files with the prefix "BEFORE_HOTFIX_"
3. I left the original aircraft.cfg files intact
4. Then I installed today's Hotfix
5. Sure 'nuff... the liveries are gone after the HotFix
6. Comparing the [LIGHTS] section of the aircraft.cfg files from the "BEFORE_HOTFIX" to the "POST_HOTFIX"
7. Hopefully I haven't missed any other edits. But, I can see there some changes were made to the LIGHTS parameters
8. Furthermore, I discovered there are two (2) SMOKESYSTEM headers in the 900ngxwl of the POST_HOTFIX aircraft.cfg file

So, I've performed the 'cleanup' myself and am now OFF to find and airport where it is already nighttime. If anyone else has discovered this issue, I suspect that posting their findings might be helpful to the entire community and the developers? Kind regards, KeithCOA382

This already been addressed in 2 other threads. http://forum.avsim.net/topic/344658-dim-light-doesnt-work-with-hotfix/ http://forum.avsim.net/topic/344725-pmdg-team-there-is-an-error-in-the-900ngxwl-aircraftcfg-file/

Oh! Then let's proceed to filling up with Jet-A and "Turn 'n Burn" Cowboy... Cheers, Keith