I was wondering about the same issue; I installed the beautiful airport, and made a Ortho-tile over the scenery...
I put the mesh- patch into my global HD-mesh- folder and realized that the folder didn't have that tile. I then did a Ortho-tile with the patch included in the download and added the Ponta Delgada name to the end of the otho-patch (zOrtho4XP_+37-026_LPPD_Ponta_Delgada).
I opened up the sim, and voila; it worked! Some areas were a bit flat, but that might have t do something with my older GPU also.