If, by "same problem", you mean that you are seeing both our scenery and something else, then it's another scenery in conflict. Way to fix this has already been suggested above, by using an airport scanner to search for duplicate files.
If, instead, you simply don't see terminal buildings, than it's an entierly different issue, and it's best to post it in a different thread, otherwise it could get confusing by mixing issues caused by other sceneries (which this thread is about) and just disappearing buildings, which is different and requires different solutions.