Xplane 12 - Ireland Scenery Windowd

Hi all, I am a new member and xplane simmer.  I downloaded the ortho Ireland which said to be compatible with xplane 12.  I extracted the package and copied the contents of zireland into the custom scenery folder a d when i ran xplane, the grass looks much sharper but my airport terminal, buildings are misskng. They were there with the default data. Anyone would know why this is the case?