Just curious. I notice that there is a newer software version available on the furuno website for my bottom machine. I downloaded the compressed file out of curiosity, hoping it would contain installation instructions, but no such luck. I'm not aware of any way to interface my FCV-585 with a computer or data storage device in order to effect a software upgrade. I don't understand why they would make that available on the website if there's no way to install it. What am I missing here?