Alternatively, you can buy four aftermarket rubber wiper refills (e.g., these from Amazon) for about the same cost as one Honda-branded refill. The ones I linked are very simple to replace, have worked well, and are much cheaper than buying four replacement blades.
There is an opening in the bottom of the blade. If you pull the rubber part in - away from the plastic cap and past that opening, you can then slide it through the opening and out of the blade. Slide the refill through the opening into the blade and then pull it back into the plastic cap.