I don't see how the helicopter crash could possibly have anything to do with our module. The loading order matters, but we fixed our installer to put the correct order 2 years ago when the problem was discovered.
Just as a test, can you try to simply disable the Addon Manager, by putting the following line:
<Disabled>True</Disabled>
in your %APPDATA%\Microsoft\FSX\DLL.XML file, in the line that loads the Addon Manager (bglmanx.dll) the line is already there, and it's by default set to False, just change it to True, and you will disable the loading of the Addon Manager.
If your audio environment still crashes with helicopters, than you would be sure it's not related to the Addon Manager. Of course, you'll have to re-enable it to use any FSDT product, but just for testing, it might be helpful to do this.