Hey.... so what happened to brush set import? How do I import image alphas to use as texture masks for my brushes?

So I recently got a new computer and I didn’t manage to save my old user settings from my old computer. So stuff is all different from what I last set it as when I last did some blender stuff. But… where’s the brush sets import? I know it’s an add on. I installed it. It does not work. It will not install. How on earth am I supposed to install brush textures to use in my brushes? I’m like super confused.