Originally Posted by
irgo
"Upgrade Software" is only the PC Interface you will have no problem,
its because every time you run PC Interface it will detect new software from the site. it also because the site already had the new PC Interface to download.
if you are still using PC Interface from HW, you will always able to get your 422 out of your speedo and switch them with old firmware that compatible with SP PC Interface, right now SP PC Interface is not compatible with your 422 firmware from HW, so stay with HW PC Interface.
Where can I get d/l the HW interface?