I found some Google instructions, and am heading back out with a screwdriver in a bit!

Here they are, for what it is worth...

Instructions
Difficulty: Moderate
Steps

1 Step One

Look up your vehicle's make and model in the reference books where wiper blades are sold. This reference will provide you with the correct model of blade to purchase.

2 Step Two

Open the package containing the new windshield wiper blade. The package should include up to three or four different styles of blade attachments, the small plastic piece that secures the new blade to the wiper arm.

3 Step Three

Examine the existing attachment (where the arm and the blade meet), then find a new one in your package that matches it.

4 Step Four

Grasp the windshield wiper arm and pull up, away from the car. The blade and arm should now be sticking out perpendicular to the window.

5 Step Five

Remove the windshield wiper blade from the arm at the attachment. There will usually be a small tab you can depress with a screwdriver that will allow you to pull the blade from the arm. Some attachments have a small metal bump and two tabs on either side; you depress the tabs and pull hard to remove the blade. Some just snap onto the blade.

6 Step Six

Remove the old attachment from the wiper blade and replace it with the new one.

7 Step Seven
Install the blade onto the windshield wiper arm.

8 Step Eight

Test by turning on the wipers. If the blades slip, turn off the wipers and seat the attachments more firmly.