With the M12S (or the other Sanwa SSL Tx), you don't/won't need the program box - at all.

Remember to plug the ESC into the battery slot in the Rx - not channel 2. The default settings will be shown in the manual. The top four settings are set via the button on the switch, but for racing the defaults are fine. Just go straight into the Tx and start setting it up. First thing is to go into the bind menu and rebind with Throttle in SSR mode. Good luck.