On my '13 MC, it was pretty easy.
First, position the wiper halfway up by turning the car on, activating the wiper, and shutting the car off immediately once the wipers are about halfway.
Next, lift up the tab in the center of the blade frame using a screwdriver or something similar (see photo below) and that should loosen the wiper.
Then, push the wiper frame down towards wiper arm and the whole thing should come off.
After that, install the new wiper in reverse order (I installed a new OEM wiper which fit precisely and which is what I recommend).