I have a micro sd with gpx files from Missouri conservation website. I have successfully put them on a Garmin and lawrance unit so I know they are on the card. I got a new helix 10 and read that I need to download humminbird pc and upload the data to their program and it would write them in their code and put back on the card. After downloading and putting my card in when I hit the download to pc arrow it says my card has no waypoints. It says files have to be gpx and they are. What am I missing?

Thanks