Hi Annette,
While you can only have Home Designer active on one computer at a time, you can install it on multiple computers, and then activate it on whichever computer you wish to use.
For more information on this process, please view the following article: https://www.homedesignersoftware.com/support/article/KB-01028/installing-home-designer-on-multiple-computers.html.
If you have any other questions about using Home Designer on multiple computers, please don't hesitate to call us at 208-292-3400.
Alex Parenti
Chief Architect Technical Support