You can download the full Nuno Navigator software for free in order to try it out. It will work for a little while so you can play with it.
You need to have internet access while installing Nuno. The installer looks for any of the necessary components on your PC and only downloads the parts you need.
Nuno works on any Microsoft Windows computer.
If you buy a Nuno licence, the free trial software will detect the licence automatically. Then your copy of Nuno will work forever.
A licence comes with one year's Nuno subscription, which provides chart updates and upgrades to any new versions of the software.