Blue block appears at airports

[golfacce2]

Hi - I am using P3D V4.4 -
Issue is: P3D V4.4 scenery has blue blocks appearing above or around airports or other structure cluster areas. These blue blocks do no appear over bodies of water, mountain terrain, or flat (desert terrain).

Thought they were related to ORBX, however, got a response on their forum that says these are Visual Navaid settings issues... Not sure I understand which settings cause this issue.

How do I get rid of these blue blocks?

Thank you
Golfacce2

[DaveWG]

I'm sure that's too do with the "Navigation Visuals" options, under the "Navigation" menu. I'm not at the PC to check the exact settings, but you should be able to find it there.