i see, “sometimes” you will need to reboot the pi for changes to take effect.
if i recall correctly, in the attract mode tab (where you find generate favorites) there should be a “reset” button. but like i said this will hard reset the PI and remove any edits you made to controller setup etc. along with favorites.
i will need to look at it hands on with my machine to re familiarize myself with it to try and help you further, hopefully someone comes along before hand and offers you aide, as im not certain when ill be back home to do so.
sorry i wasnt able to help you further speedy.