Looking for the Ultra or Lite download? All editions have been combined into the single download above.
Install - Use the download above (the Download Now button)
License - If this is a major upgrade, the installer will check your license to see if it is eligible for an upgrade, and download a new license in that case. Your license file is what turns the installation from a demo to a production installation.
Configuration - The installer will keep your existing configuration
Database - The installer will keep your existing data
You might need to reset the PA File Sight service's Run As account (from Settings or the Windows Services applet), but other than that no further configuration changes will be needed.