See link below. If it won't budge, you may have missed a screw. If not, he describes the motion of releasing the clips pretty accurately from what I can remember. Like he says, be gentle. If you force it, you'll have to go to the dealer to get new clips:
"Once you have all the screws removed, the entire door card needs to be pulled out towards you. Start from the bottom, as the top MUST come out last. This is where the extra optional "snaps" come in from the tools needed list. There is literally zero to no chance of pulling these off without breaking a couple. They get old, they get brittle, and they aren't meant for continuous usage. The key is to pulling out as perpendicular as possible to the door. Work your fingers around the outside of the door until you find a place you can get a good hold and pull. Work around from positions 3 o'clock to 9 o'clock until the whole bottom is off. Now you need to pull the top out of the window well. This is done easiest with the windows down of course. The best way is to grab it on the outside corner and pull up in a "Lamborghini doors" type motion."