The problem in KLAS is fixed with an OrbX fix, which is available on their forum. I'm not aware of issues with KLAX or if OrbX has made a fix for it, assuming they actually exists.
Of course, like all our products, KLAX is available in Trial version, and the whole point of having a Trial, is that you can test for conflicts caused by other sceneries installed in your own system, which we cannot possibly ever test. And, assuming a fix (which must come from OrbX) is needed or required or available, you can test the fix as well, while KLAX is still in Trial.