Sorry - I don't have a solution for you. I recently posted the same problem with Basecamp so I was pretty curious about this. I downloaded the Florida topo and, sure enough, it shows up just fine. Since I'm new to the software I thought maybe I was doing something wrong, but apparently not. Not sure if that's good news or bad news, but hopefully there is a fix available. Hard to believe we're the first ones to report a problem using Win8 as it's been out for quite a while. Oh well, maybe people are only interested in Florida (spoiler alert - it's flat).