The Quantum update file contains the OS with the software for the synthesis, GUI, etc. and a separate software for the panel controller which drives the buttons, LEDs and potentiometers. Both of these are just in one file, the quantum.update.bin. If there is a newer panel software available in the update file on the card, Quantum will notify you about this panel software update when you update the main OS. In this case, you can push the Flash Panel button. Otherwise, this function does not have to be used.