Yep, PokerStove is your friend. I don't fold KK before the flop unless I'm up against a super nit, who shoves over my raise and I haven't seen him 3bet in 1000 hands. And even then it's questionable. Even the times we are up against AA we still win 20% of the time, and a lot of other times, you'll be up against JJ+ and AK (or much worse with some people) against a PF shove... So folding is not a habit you should get into with Kings. You should never be mad at yourself for stacking off with KK preflop, like ever.