Navigate to the official Panasonic Global Support audio firmware repository.
There is also an element of exclusivity in the user experience that these updates unlock. Panasonic has historically used firmware to discreetly adjust the equalization curves of their high-end units. An owner performing a software update on the SC-UA7 may find that their device suddenly offers a wider soundstage or a more aggressive low-frequency response. This "secret menu" style of enhancement creates a sense of intimacy between the manufacturer and the user. It is as panasonic scua7 software update exclusive