OK, we've had this discussion quite a few times in the PZI forum. Exposure to light seems to be a bigger concern than being out of the fridge. If it was still in the box, then that's a great thing. Many Prozinc users have left theirs out for that long too with no ill effects. They usually recommend that you continue to use it, and see if there is an obvious indication by the BG numbers you get that the insulin is no longer working. If so, then yes, order some more. If not, then you might see that it starts to become less effective in the future (before the expiration date on the box), but in most cases, that didn't happen and everything was fine.
You can ask this on PZI and get direct response from the people who have done the same thing.
Carl