I use table saws. I have even slightly touched the blade before (I was lucky) for a small scratch. I'm gonna have to say I don't even want to try it with the saw stop hardware. I love using such a device, even with the damage done to the saw. I do wonder if the damage to the saw is greater than just the blade and saw stop. I can see this warping the shaft that the blade is mounted on. That would also lead me to think that a whole new saw would be needed after the accident, if there was extensive damage and the cost were high to repair.
My father was changing the blades one day and his pants pocket caught the switch and turned the saw on. Such a saw stop device on this day could have made things worse, while his hand was down in the hole with the blade. He didn't loose anything but a couple of his fingers received permanent damage from the blade cutting across the top of his joints. From that day, we started doing as the instruction manual states and unplugging the machine for blade removal.