When a new version is released, simply download and install it in exactly the same way as you did with the original version. Please check that you are still entitled to free upgrades before you install! You can do this on the helpdesk by logging in and selecting the "Licenses" option. If you installed using the Windows Installer (MSI) package, there is no need to remove the old version first.

The plugin can check for updates both manually and automatically. If an upgrade is available it will tell you whether your free upgrade period has expired.