It is just a plastic film. I just got mine today and it took me a second to figure this out too. I just used a mechanical pencil with a metal tip to pry the corner up. I wouldn't use something too sharp but it needs to be pointy. Maybe a fingernail would work too. As long as you don't have sticker residue like I had on mine, you could probably just leave the film on there to protect it. It would be a free screen protector!!

Good luck.