no, I haven't used it to install your scenery as your installer are p3d v2 ready.
But, I don't know why, now the problem seems to be solved.
I start the sim on my default location to change the mesh complexity to 5m instead of 2m, and then switch to klax , and everything was fine, so I tried to change again the mesh slider to 2m, and is everything fine also with the mesh at 2m.
So, I don't know why now everything is working as it should!
Anyway, thanks!
Paolo