OK this is starting to make sense... which version of the game are you using? (Original, Skidrow, Theta?)
I'll anticipate what I'm guessing: before the DLCs there were no charms in the game, so the game wasn't needing the second parameter for AddMultipleChoiceAnswer that can disable the choice. I think they added this capability to the executable after one of the updates. This means that if you are using Skidrow version, which comes with no updates at all, AddMultipleChoiceAnswer can't have 2 parameters according to your executable. Either you switch to Theta, or you can't get most charms to work properly.