So what does this really mean. I have two sets- the Wyoming and California sets. I could care less about any fancy upgrades or gizmos. I thought the software I have is independent of the internet and they will still work as a stand alone on my computer. Am I wrong? Does it just mean if I want any more state topo sets I had better buy them now? I just got a new computer so reinstalled TOPO and it asked for my serial number. So does this mean if I want to load it on another computer in the future, it would not work?