Grunker
RPG Codex Ghost
I might be (I'm at work so I can't check), I just seem to recall something about scaling only being activatable on a new game.
Pretty sure you can activate and deactivate it at any point, scaling (afaik) works when the area is loaded for the first time, so only the areas you've visited won't be scaled after activating the option in the middle of a game.
Brilliant, crossing my fingers for that. Will return when I'm home.