Everything shows up in the menu just fine
This means everything's fine with the installation, and should simply stop worrying about antivirus and any other install problem.
but the artifacts are still there with all of the fsdreamteam sceneries. Same deal... KSFO is fine.
I don't quite understand what do you mean with "artifacts", they surely can't be a problem of the sceneries, if they were, we would have heard many reports by now.
As I've said already, it's NOT POSSIBLE that installing a scenery would make problems with *trees* to ANOTHER FSDT scenery.
The only possible explanation for this, is that you installed SOMETHING ELSE, like a 3rd party vegetation "enhancement" package, which has meddled with the default tree textures, which is affecting all the FSDT sceneries that use them, either as Autogen or as scenery objects.
Fact you think it's happened after installing the KORD update, was just a coincidence, or simply because you checked the affected sceneries only after installing KORD, but the problem already happened when you installed the other thing.
OR, even if you haven't installed anything of the sort, it might simply be an issue of the default tree textures being corrupted for any reason (entirely unrelated to the KORD installer) on your hard disk, so any scenery calling some default textures will show problems.
The only thing 100% sure, it wasn't *caused* by the KORD update, because in case we refer to default textures (when the scenery use Autogen, this is absolutely normal) we never, ever, modify or touch the default files so, it must have been something else.
You might not see the other problem in other sceneries (KSFO, for example) because the different Land Class in that area might just call *different* default tree textures, which are not corrupted on your system.
