So, I was messing around with the Blender addon and for some reason, the legs just won’t move. I have it set so that it uses the fk rigify bones and I did everything the same way as here.
(image shows what’s going on)
Thanks for posting this here and welcome to the forums @cappyadams! 
By not moving, do you mean the simulation, as in the picture, or the recorded result?
Per default, the first control will be set to Animated, meaning it will follow your animation 100% and not fall with gravity. Try setting this to Simulated and both it and the legs will fall. Or animate the hip, and it will follow.
Oh! Setting it from animated to simulated fixed it! Thanks! 
Indeed, see here:
https://learn.ragdolldynamics.com/blender/tutorials/manikin/#drop-test