Hi Guys
The downloads are available here:
http://www.airnavsystems.com/RadarBox/support.htmlDownload the software version you've bought, 3D (version 4.03) or Pro (version 3.13), and, only if you have 64-bit Windows, the 64-bit drivers at the bottom of that page.
MOST IMPORTANT: When installing the software, DO NOT accept the default installation directory. Instead, edit the installation path to remove the "\Program Files" bit, so that you are installing in C:\Airnav Systems
Most people who have had problems, including with the database updates, have not followed that advice!
If you have a 64-bit machine and you have downloaded the 64-bit drivers, follow the advice given below the 64-bit drivers link on the support download page.
Hope that helps
Rod