Using Mathcad on a laptop

I have a licensed copy of Mathcad 14, purchased a couple of years ago. At this stage I am bound to use the product on a single PC. I understood from the site that it is possible to borrow the license to use it on a portable laptop PC (floating ?). Could someone please provide me with a step-by-step procedure of how to use the software with my laptop? Please don’t forward me to the support site. I tried that already and got nowhere. Thanks!!