I erased all thre sceneries and installed them again. THey are not put automatically into the scenery folder of the FS.
Nobody said they are automatically put into the "scenery folder of the FS" (not sure what you mean here). They are put into the fsdreamteam folder, under the main FS folder.
However, they ARE automatically added to the SCENERY LIBRARY (which is not the same thing as the scenery folder) and it shouldn't be necessary to add them manually.
If they aren't, then something is very wrong with your system.
Are you ABSOLUTELY sure you are using the current installer that is online, and not an older version instead ?
So then i add them manually by going into the ORD/scenery - no texure.
Do you mean that, the first time you add them manually to the Scenery Library ( which shouldn't be done in the first place, because they ARE automatically added, this is confirmed), you initially see all the scenery, but without textures ?
Than the scenery appears and i reload the FS . Then - NO Buildings.
This is not what usually happen, with ANY scenery. The first time you add a scenery in the Scenery Library, it will NOT show up, until the next time you restart FS9. FS9 give also a red warning about this.
Instead, from your description, it appears you are seeing exactly the opposite: you see the scenery immediately when you add it to the Scenery Library (which, as I've said, shouldn't be done, because the installer does it), but it disappears when you restart FS9.
Which is exactly the opposite to what happens normally, and with any scenery, not just ours.
can also not register the scenery through the addon manager
You said yourself that you already registered the sceneries with the Addon Manager successfully, on your first message. So, it's quite obvious you can't registered them anymore, since you registered them already. This should be confirmed by the Addon Manager itself, that should show a scenery as "Active" if you choose the About option.
In any case, you should STOP thinking that your problem has ANYTHING to do with activation or registration. I already said it once: when the scenery is not activated and there's any problem with the activation, IT WILL NOT JUST DISAPPEAR!!
If you lose your registration for any reason, the scenery will go back to TRIAL MODE. Meaning it will work in full for 5-6 minutes at a time, with nothing missing. It will disappear only after 5-6 minutes, then you can launch FS9 again, get another 5-6 minutes of Trial, and so so, without limitation.
If the scenery simply doesn't appear, IT'S NOTHING RELATED TO ACTIVATION. It simply means there's a problem with the installation, and IT'S NOT an Addon Manager problem or an antivirus problem because, it if was, you wouldn't see any Addon Manager menu to begin with.
So, please, for the last time, just stop worrying about registration or activation, because your problem doesn't have anything to do with it.
Now, let's start from scratch again:
Are you sure you are using the CURRENT version of the installers that is online now ? If not, download them again.