A site license is exactly that, a license for one physical site.   A home computer would not be part of a site license for a business site unless it is a home-based business.   For licensing purposes, you should purchase a single license to use on your home computer.

That being said, the site license should not affect your abiity to download the trial software an use it at home.  If you want to provide further information, we will try to assist you.   We need to know what, if any, error message you are receiving when downloadig at home, or exactly where in the download process it is failing.