Sorry! But I should not have to do that to get your product working on my computer.
You don't have to do what "just" to get our product working.
You have a problem with your FSX.CFG or your video driver, and you are mislead thinking it's anything related to our product because you noticed it now, but that doesn't mean you don't have the problem, you simply haven't found another add-on that would expose that issue you are already having, yet.
GSX objects use only 100% FSX standard materials and settings, so if your system cannot display them properly, it's a sure indication of a problem with your settings.
The most likely problem is an FSX tweak that you applied that doesn't work well with your video drivers.
Thanks for the quick reply and the demo version. But I'll pass.
You are obviously free to make wrong choices, that's your system, but the problem will surely resurface again with another add-on, so you'll have to do it anyway. In fact, you should be grateful, instead, that installing GSX has exposed something that you are supposed to fix. It's only your loss if you don't act on it.