A few weeks ago, I tried to free disk space on my C: drive and moved my 4 FSDT sceneries (KJFK, KORD, KLAS and KDFW) to my D: drive.
They wouldn't work on a different drive than the FSX one, but this doesn't have anything to do with the activation.
- after uninstall/install on initial C: drive following the instructions of item "In case of an hard drive crash, for example, the best procedure is:" of the forum reinstallation topic)and, despite the fact that I have entered my registry activation keys, buildings are dissapearing from the sceneries (or partly appears) after 4 days.
This doesn't hava anything to do with reactivation too. If there's a problem with reactivation, the scenery will work in TRIAL MODE, for 5 minutes at time, it surely won't disappear after 4 days.
Fact you said it PARTLY appear (if with "partly appear" you mean parts of buildings showing), seems to indicate an entirely different problem, which doesn't have anything to do with the activation either, but it's likely a video driver problem, video memory exhaustion or a tweak in your FSX.CFG that shouldn't be applied.
The only way to solve this is a full installation again + running the resizing pgm when available. Slightly annoying isn'it?
If the problem was fixed by a full installation, it's likely you had something outdated. I don't see any reason to run a resizer, surely not on FSX.
As stated in the User's manuals and forum items, I didn't deactivate/reactivate the product on line as this should not be necessary when owing the registry activaion entry key and also because the number of activations is limited.
The manual doesn't say exactly that. If with "owning registry activation key" you mean the .REG file, that's NOT a magical "reactivator". That .REG file ONE and ONLY reason to exists, is to SAVE you from typing the Serial Number manually, and that's it.
It doesn't do anything else, and it's not enough to reactivate a scenery. It's only ONE way of insert your Serial Number in the registry, the other way is to manually type it using the "Register Serial" button of the Addon Manager. Whatever method you use to insert your Serial Number in the registry, it STILL must be activated!
The activation key it's ANOTHER registry entry, and it's no use making a backup of it, because it CAN'T used when moving to a new hardware, reinstalling Windows or changing the Windows startup drive. When any of these happens, you will have to get a new activation key from the activation server, that will be automatically generated (if you have spare activations available) starting from your Serial Number, that's why it's no use saving that key in a .REG file, because it's only valid for the hardware config it was created from, and you'll always get a new one when you change hardware, reinstall Windows or change the boot drive.
I don't believe that NVidia drivers could cause such problems: why would it be working during 4 days and suddently fails (without updating the driver in the meantime of course).
They surely aren't, I use nVidia drivers too, and never saw an activation key being lost just after updating drivers.
It's more likely all your play with registry keys, instead.
Also tried to move the scenery layer on the top of the "scenery.cfg" file but no change.
You are mixing entirely different problems here. Now, it's not clear anymore if you are not seeing *any* scenery, or you are seeing it "partly".
If the activation is lost for ANY reason, the scenery will not just "disappear", or disappear "partly". It will WORK IN FULL for 5 minutes at time, then you'll have to restart FSX, another 5 minutes will start, and so on, without ANY expiration date, it will work like this forever, until reactivated.
So, just forget about the activation issue. If the Addon Manager says the scenery is Active, then IT IS Active.
I would like to keep by blood pressure into acceptable limits and would be pleased to have this issue definitively fixed
I really don't fully understand you now: you said that a full installation solved it. So, has been solved it or not ?
As explained many times already on the forum, if you install only the Stand-Alone Addon Manaager for FSX AFTER every scenery is installed, it will usually update all that needs to be updated to make the installed sceneries work so, a full reinstallation of the scenery is usually not needed, unless your scenery was installed with a fairly old installer, but you will be notified of this at the FSX startup, unless you chose to NOT be notified of updates for a specific scenery.