Hello
As you well know at this stage, Regarding Tongass Fjords and manually editing the terrain.cfg file, if FTX Central is crashing this means your terrain.cfg file is corrupt.
When you launch FTX Central among other duties it will it will check your scenery.cfg file and your terrain.cfg file, Specifically a corrupt terrain.cfg file will cause FTX Central to crash and will also cause trees and water to appear out of place.
Your scenery.cfg file and your terrain.cfg file are generated files, meaning if you delete these files they will generated again as default (Clean files) when Prepar3D is launched next
Regarding Orbx Scenery only, If you run into trouble you could simply delete these 2 files, Then launch Prepar3D to the first screen and then shut it down again, This will generate these files again as default.
By then Launching FTX Central and wait until you see a message on the bottom left of the screen "Activating Orbx scenery" this normally takes about 10 \ 15 seconds. This will reconfigure all your Orbx scenery back into both of these files again
So basically if you run into trouble you could follow the above steps and then start again.
EDIT: Just to add.....
There is no need to delete your scenery.cfg file if you are having troubles setting up your terrain.cfg file, The above Information is only letting you know you can always get clean .cfg files by deleting them and launching Prepar3D.
Of course deleting your scenery.cfg file will disable (Not uninstall) just disable all your
Non Orbx Scenery. It wont effect the Scenery Add On's that have been Installed using the add-on.xml file method (Grayed out entries in the Library) As these are launched from the add-on.xml file in Prepar3D Add on's
> Documents.
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The trickiest thing about this great Scenery package is setting up the Terrain.cfg file, A lot of folks will fall down on the re-numbering of the Tongass entries just like the Image below shows
Excuse the terrible bright blues and reds, I really must update this
Re-numbering Tongass entriesAnd the DefaultTextureCount like the Images below shows
DefaultTextureCountYou would then Insure to Save your edited file by clicking File (Top left) and clicking
Save