There's a pretty big bug in my simulator where Golds will disappear from the supply after a couple of games so the remainder of the games will be played without them (this can not be seen when running the sample games). I'm currently unable to release the fix, so you shouldn't trust any results from simulations until the next release.
(for those interested in the reason why: Fool's Gold required extra code for the Province Card where I made a mistake so each time a Province is bought one Gold will be taken from the supply and is never returned)