Tim--It's pretty standard software licencing stuff for any commercial product. I'm surprised you haven't run into problems before, using more than one program licenced to the same name with the same serial on the same network. I would assume that most software companies don't plan on a single person running multiple copies of the same software at home. Considering that there is multi-user licensing available, it would be a huge waste of resources to make specific licensing available on a case by case basis.