Oh... sorry tom, I've just re-open the VI and saw that the array index is set to 31... It is just because at first I hadn't put the "to u8" node so the array had 32 elements... just change the 31 to 0 and you'll see your LEDs switching ON/OFF when you modify the switches 😉
We have two ears and one mouth so that we can listen twice as much as we speak.