Struggled quite some time to get rid of the newest fw on I2 and RC - thought I would just post the way to do it - I searched but could not find a thread with the description. If it is somewhere else in the forum mod can remove or merge this into that thread. Connect RC to mobile dev normal way. start Go4. when open, touch and hold the three line menu top right corner for a few seconds( was always the academy icon which is now inside the menu). Then select which version you want.