Jumper,
Don't worry about it, I took Air Law yesterday (92% and six papers to go!) and went in expecting the 3 choice paper but was given the new paper with 4 choices, apparently all the old papers have to be used by Feb 28th but if they have the new ones that's what you get!. But if you have done your study (essential) along with memorising the confuser you know the answers anyway! Good luck.
Chris