This error has been discussed several times, and it's not a bglmanx error, but it's an FSX bug, since it can happen with any FSX module, especially a newly trusted one. As explained in all other threads:
- Be sure that you don't have ANY "Compatibility" modes selected for the FSX.EXE file. To check this, right-click on it, select "Properties", select "Compatibility" and be sure NOTHING is checked on that page, which is how FSX installs by default.
- Even if FSX says the module might not run, ALWAYS allow to run it, even if FSX crashes.
- Try a couple of times entering/exiting from FSX, and ALWAYS allow the module to run, even if FSX crashes.
- If it doesn't work after a couple of tries, REBOOT Windows and try again., and ALWAYS allow the module to run, even if FSX crashes.
If all of this doesn't help, be sure it's not the antivirus that has corrupted the file, mistakenly trying to "heal" it. In this case, the correct procedure, as explained in many other threads, is:
- Uninstall GSX. 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 GSX (using the full installer in this case) 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 products" menu under the "Addons" menu.