MK193 cube Animation question

Just finished making this 3x3 cube. Fun kit, easy to make. When using the animation software, everything works fine except I can’t change the LED intensity slider. Also, I am not sure how to send different animations to the cube. What I’m trying to achieve is the same animation, but with 4 different brightnesses. So pressing the “next” button acts as a dimmer control.
I am only using 8 LEDs and they were not the ones that came with the kit. I don’t know if that causes issues. They do work fine.
Lastly, is there a way to clear the 193s memory so I only have the 4 animations I want?

Thank You,