Did the techie say that if you downloaded BaseCamp you would be okay? If this is true, this might be an easy fix. BaseCamp is free. Once it is loaded, plug in your unit and hit the download button.... then your gpx file(s) is on your computer. The file can then be uploaded to CalTopo or any other program you tend to use. (I used to use a 60csx. I'm now using a 62s with BaseCamp as the interface... on a Mac. My husband is using BaseCamp on Windows 10.) I'd be glad to walk you through it if you go this route.