ToME: the Tales of Maj'Eyal

So, I wanted to diable this for a while, since I was starting many runs, checking some stuff, then leaving them and deleting saves, and didn't want that mess on my vault.
Unfortunately, this setting (all others work ok) seems to revert itself each time I leave the game, or end a character/start a new one.

Is this intended? If it is, maybe having three options, like "always", "not for this character", "never" would be better?