When I got my GX65 I downloaded the March location updates and after hooking up the detector to a USB port started the update software. I was surprised that it took over 3 hours to complete but chalked it up as needing time to format and update the first time. Yesterday I downloaded the April updates and once again it took over 3 hours to complete the update. Is this normal? Seems like it should be able to do the update in a matter of minutes, not hours.