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[TheSevenflyer]

This link may be your answer.
The poster uses LFOU as his example:

CTDs caused by 3rd party airports

Ok, I figured this out. This can happen with any add-on scenery, whether purchased from the Marketplace or downloaded from the interweb (e.g. flightsim.to) and added to your community folder. And you can fix it yourself. It’s quite straight forward. What’s happening is that sometimes scenery developers are leaving behind some of the default folder names as they are initially created in the template for a scenery project. Then later, when you have more than one of these scenery addons instal…