But even with the FSX AI planes/textures, there are no shadows. Do you know if there is an update to fix this issue?
As I've said in my previous message, the shadows are automatically turned on/off by the Addon Manager, depending on the altitude because, due to how the ground textures are made, you won't see them anyway after a certain altitude, so there's no reason to kill your fps with shadows you won't see.
And, due to how FSX works, if you *quit* from FSX when the shadows are off (because you were higher than the altitude threshold when you quit), they will be remain off.
Check your "Airplane cast shadows" option, it's likely off now.