FSX will crash to desktop after installing ANY of the ADD-ON MANAGERS.
There's a sticky thread in the General section about this forum, which has been made as sticky, so it's impossible to miss:
http://www.fsdreamteam.com/forum/index.php/topic,10489.0.htmlYour mistake, and the main reason of all your frustration, is your wrong assumption this is some kind of "bug" that needs to be "fixed", or it's CAUSED by any of our sceneries, or their installation order or anything like that.
The REAL cause is something entirely different, which I will show you when you'll contact me in private, as instructed in the thread, which has the one and only working solution.