Your tutorial says that my lens will be in a black circular plastic holder. My lens in enclosed in a circular edge, that is part of a larger black plastic square. Will the square stick? does it matter the orientation?
You can pull the circular lens away from the square, almost like peeling the circle off the square. You will want to be gentle and avoid sudden movements, but you should definitely know when you are on the right track to removing the lens. Let me know if you have other questions or would like more specific guidance.