Emder3 Pro with extended with 400mm Bed not working with sonic Pad

My Ender3 Pro was upgraded with the extender 400mm Bed and I can not get it to work with my sonic pad. I have upgraded the motherboard to the 4.27 board and a CR touch. there are no choices in the Sonic Pad and I can’t edit the bin file. I have ontacted customer service over a month ago but have not been helped or contacted.