They are pretty easy now. You actually replace the entire blade assembly now. If you go check out the wipers, you will notice how they kinda connect to the arms. That whole end piece is replaced, not just the rubber parts.
I assume this as it has been this way on every car I have had. So I better go look. But it really is simple, and the instructions are normally on the box as well.
Heres a generic article, but it is pretty accurate.