I have installed the update through the sim
No, that's not enough. This is NOT an update that can be launched inside the sim. As I've said in my previous message:
The problem is fixed in the latest version of Couatl.exe, which will be downloaded automatically by running any FSDT installer. No need to replace files anymore.
If it were possible to apply this update through the sim, I would simply said "just run Live Update". If I said you run an FSDT installer, it's because it was needed and there isn't any other way to get the updated Couatl.exe
the update should have been installed because I saw the coatl.exe restared, but the problem still exists.
No, the problem is fixed, but you haven't updated Couatl.exe, which can only be done by
running any FSDT installer.Fact that Couatl.exe it has restarted, doesn't automatically mean it also has update itself. If it were possible and/or reliable to update Couatl.exe in the middle of a restart, there wouldn't be a difference between a "Major Update", that requires to exit from FSX, and a "Minor Update", the doesn't require to exit from FSX. The difference is also explained in the GSX manual.
To get the updated Couatl.exe you MUST
run any FSDT installer. It doesn't matter which one (GSX, the Stand-alone Addon Manager, a scenery, anything), but you must exit from FSX and run that installer.