When you say "cannot get my FSX to work now", are you seeing some kind of error (if yes, which one ?) , or the sim just quits ?
When you say "other's seem to be working", are you refering to other FSDT sceneries, or other sceneries in general ?
In any case, if the sim just quits, the most likely cause, is that your antivirus has blocked the upgrade to the Addon Manager that happens during the installation so, you might be stuck with the previous version you had before KDFW but, in this case, you install is not correct, and will result in a quit without any messages.
The solution is usually as follows:
- Uninstall the scenery. Reply YES when asked if you want to remove the Addon Manager and the Couatl Engine. Reply YES to both questions.
- TURN OFF your antivirus. Don't just exit from its interface, but turn off the real time protection. Actual wording changes between products, however, it's the option to scan every file that gets open in real time, without user intervention.
- Reinstall the scenery with the Antivirus TURNED OFF. Don't launch FSX yet.
- Configure the antivirus to exclude the following files from scanning:
YourFSXFolder\bglmanx.dll
YourFSXFolder\fsdreamteam\couatl\Couatl.exe
YourFSXFolder it's usually C:\Program Files\Microsoft Games\Microsoft Flight Simulator X, if you installed it in the default folder.
- Now you can turn the antivirus back on, and launch FSX.
- Check you are seeing BOTH the "Addon Manager" menu AND the "Couatl powered plugins" menu under the "Addons" menu.