EDIT: As stated by Mr Venema, it is best to wait until an official fix. Do not try the following unless you agree that is unsupported and that you may loose both your FSX installs and even maybe you windows install, if you do a mistake somewhere.
This is for people who have both FSX box edition and FSX SE, and to an extent for people that have deleted their legacy FSX but who are still having issues pointing the installers towards FSX:SE
After many hours pulling my hair and trying to get this to work I believe I have finally figured it out. Before I start I want to point out some important locations and fact. FSX boxed and FSX:SE are designed to work while both are installed. Hence you will have 2 different folders named "FSX" and "FSX-SE", containing your sceneries config. They are located at C:\Users\<username>\AppData\Roaming\Microsoft\.
You also need to understand that at the end of this process you will have 2 Orbx installations and 2 different FTCentral.exe. So when you will need to start FTXCentral be sure not to use a desktop shortcut but to navigate to your Steam ORBX folder and start it from there (C:\Program Files (x86)\Steam\SteamApps\common\FSX\ORBX\Scripts\FTXCentral), that will make sure you are starting the right FTXCentral. Last, it is a good idea to run FTXCentral in admin mode (right click and run as administrator) as it is located within "program files (x86)" The registry hack was pointed out by JRobinson at fsdevelopper forums and kindly provided to me by jim F on those forums (thanks). Also do this at your own risk. It seems to be ok on my computer and until an official switcher is released by orbx there isnt much you can do... NOW follow those steps. 1) Start regedit (start menu>type regedit in the search) 2) Backup your whole registry. Right click on computer and export 3) Navigate to HKLM\SOFTWARE\Wow6432Node\Microsoft\microsoft games\flight simulator\10.0 and change the value of setupPath (after writing the old path for reference) to point to your Steam FSX (C:\Program Files (x86)\Steam\SteamApps\common\FSX). From now on wether you are using or installing into your steam FSX you must have this reg entry. If you decide to use your legacy FSX you only have to revert to your old setting. 4) Install your Orbx Region/scenery. It should now see the correct path to FSX SE 5) Close FTXCentral 6) navigate to your new Orbx directory (C:\Program Files (x86)\Steam\SteamApps\common\FSX\ORBX) 7) edit those 2 files : script/FTXSettings.xml and script/FTXCentral/FTXSettings.xml and change "<SceneryCFGLocation>Microsoft\FSX</SceneryCFGLocation>" to "<SceneryCFGLocation>Microsoft\FSX-SE</SceneryCFGLocation>" run FTXConfigurator.exe to update your library 9) run FTXCentral, check that your scenery library is the new one 10) Fly FSX SE and enjoy your Orbx scenery
