I fail to understand why this would have anything to do with FSDT or GSX. Unless you noticed the runway lights disappearing as soon as you selected GSX, which doesn't seem to be the case from your report.
Ok, sorry, I misunderstood you: I thought that "Orbx SCA" was an airport, and you lost runway lights *there*...are you saying that, before installing this OrbX product, runway lights at KLAX worked, now they don't work anymore ?