Put them in the F-16C_50 folder located in your saved games folder located in your User folder.
C:\users\your named folder\Saved Games\open beta or stable\Liveries\F-16C_50
Use a zip program, like 7-zip to open the mission file and see if it contains an options file that is controlling what you see. If there is, it will over ride your game settings and can be viewed and edited with NotePad ++.
Good Luck!
I've had mine for 14-15 years and they are still holding up!
What I've seen on the net is is anything breaks, it's usually an easy fix.
There is a few fellows that have modified theirs to more modern optics.
All that kind of says enough!!