I see that with the new updates, your -blacklist setup is saved from game to game(and, although I haven't checked yet, probably the same with -prefer). This is a great idea, and I totally approve, because having to copy-paste those commands in every time was a bit irritating. But as far as I can tell, there's no way to 'clear' your blacklist if you wanted to, to allow all roles again. Not sure if this is an oversight. For now, I'm just using -blacklist mafioso(since that role almost never spawns) as an impromptu way to clear out the list if needed.
Thanks again for instituting this great idea!