Download the Wot Numbers application from the download page.
After downloading is done start the installer, both first-time install and upgrading from a previous version is taken care of by the installer.
You will be suggested to start Wot Numbers after the installation is done, if you skip this you will find a statup icon in the Windows start menu.
Detailed installation instructions can be found here: Installation and setup instructions
Please check our User Guide for more information if you are performing a first-time installation. As a minimum we reccomend reading Guide number 1 and 2: Wot Numbers User Guide