You can update to the latest maintenance release directly from the GWB dashboard: Move to the Support pane and select Check for updates.
GWB subscriptions upgrade automatically to GWB 2023 (version 17.0.3) when you select Check for updates from the dashboard.
You can also enable Check for updates automatically during the installation process or later on in the Settings pane to be notified whenever an update is available.
Additionally, the download link you received with your purchase will always download the latest version of the software.