1997 Buick Park Avenue Replace wiper blades

Hello everyone,

My windshield wiper blades make noises when they wipe against the window, it doesn't matter what speed they are going, or the amount of rain or snow falling on the windshield.

I bought new blades, but I can't seem to figure out how the get the old ones off. Sure, I know it is a simple job, but I am having trouble all the same.

Thank you