I have tried other suggestions on this forum to solve the problem but nothing worked. The most weird thing is that I have tried the trial version some months ago and it worked without any problems.
First, be sure you have reinstalled GSX using the latest full installer, or you apply one of the vehicles updates. If you installed the Trial months ago, and just purchased it now, it's possible you have missed some extra vehicles that we added in the meantime.
If you are sure your GSX includes all the latest vehicles (the latest full installer always contains everything), and you still have invisible vehicles, it's likely a problem with fsx video settings, especially if you see *some* parts of the vehicle, like the lights, or the ground shadow only. If this is the case, then it's 100% sure it's a video settings issue, which should be fixed by doing one of the following:
- Update your video driver
- Reset your video driver settings to default
- Reset the FSX settings to default, by removing the following file:
%APPDATA%\Microsof\FSX\FSX.CFG
This will force FSX to rebuild a new config with all default settings. After doing this, be sure you apply the HIGHMEMFIX tweak in the Addon Manager, save the settings and restart FSX.