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The touch buttons are actually part of your control board. Try to unplug the dishwasher or flip the circuit breaker off to the dishwasher. Clean the touchpad with white vinegar and dry it off. Plug the dishwasher back in and see if you can change the selections. if not, you'll need to order and replace the control board inside the drawer I'm sorry to say because it has failed. For that you'll need the model number which I believe is a DD603. The model is located on a sticker around the front frame of the dishwasher and seen if you pull the 2 drawers out. It'll be on the frame between the 2 drawers. The part is about $200 I believe.
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You apparently didn't replace the control board then or didn't read my entire answer because I said you would have to replace the control board if cleaning the touchpad didn't work.