Thanks. There seem to be people having a few problems in the forum so I was curious if it was a 32 bit scenery being used in P3dV4.
It's not a native P3D4 product, but it's 100% compatible with P3D4, because it was at least a fully FSX product. Most airports that really have problems in P3D4, are those which contains elements made using the FS8 and FS9 SDKs, and there are still A LOT of them.
Most of the problems people have with KLAS, are caused by having installed something from OrbX, without applying the fix made by OrbX available on their forum.