- running a different bglmanx.dll
- updating the separate parts of the installation (addon manager)
Doing this will *cause* that problem because, one of the possible causes of it, is a mismatch between different parts of the programs (files coming from older and newer installs)
- The antivirus must be *entirely* disabled when installing, and be configured to exclude the following files from scanning:
YourFSXFolder\bglmanx.dll
YourFSXFolder\fsdreamteam\couatl\Couatl.exe
- Be sure you don't run FSX in any of the "Compatibility" modes. Everything on the "Compatibility" tab of the file Properties for FSX.EXE should be off.
- Try to Uninstall GSX and BE SURE you reply YES to the question "Do you want to remove the Addon Manager" ? and "Do you want to remove the Couatl engine?". Don't skip this step.
- Reinstall with the antivirus entirely disabled and pay attention if you are being asked permission to run both modules on the next startup. If you aren't, it means you skipped the previous step, so you must Uninstall/Reinstall again.