The free one is NOT a demo, it's fully functional, and totally shits on the AKAI OS. It's a perfect bridge between the original operation of the machine and the higher functions of OS1. I've considered OS2, and tried 2xl, but honestly OS1 is amazing. A few things took a little getting used to but search this site and you'll come up with whatever you need.
But yeah hold stop and turn the data wheel till u like it, then hit the MAIN button to store it. There are numerous functions stored by hitting the MAIN button, so put hitting it a couple times (to make sure) in your routine after you change anything.
And grab the JJOS manual from that other thread. Memorize that beeyatch. You REALLY wanna be up on it grab the MPC 1000 tutorial from here. Worth every penny.
Grown Folks Music Lover