In our latest video tutorial, Rob details the steps required to install your Spybot license, if the Free Edition of Spybot is already installed on your PC. This will upgrade the Free Edition of Spybot that is installed to the paid edition that was purchased.
If you do not have the Free Edition installed before installing your license, the steps required are documented in a tutorial here.
If you have not yet purchased a license for Spybot, you can order one from here (home users) or here (business users).