heh, there have been numerous instances of 1 or 2 liveries crashing the sim after an update 
So yeh, best to just clear out the entire folder, and then add them 1 by 1 (most useful first) and see what they do.
Personally, I’ve decided to just stay away from most mods for a couple of months. I have plenty of aircraft and an entire world to explore already. The couple of mods I do use are fairly easy to check on every patch day.