And you only need to run matmatic once, it's not an "each time" thing. The only time you need to run it again is if you add new scripts to the "Matmatic Demo" folder. If you don't, then run it once and that's it...the shaders are generated and ready to access in the Material Room.

"It is good to see ourselves as others see us. Try as we may, we are never
able to know ourselves fully as we are, especially the evil side of us.
This we can do only if we are not angry with our critics but will take in good
heart whatever they might have to say." - Ghandi