Make sure you have installed the G2 Suite first.

To check for updates you need to run the G2 Suite, you can run the G2 Suite from your start menu or from the Notification Icon* found in the left hand tray at the bottom of the screen (Right Click and select G2 Suite)

Next click get G2 updates and follow the instructions.

*The notification icon is a tool we use for informing you of new application releases, if you click "Check for Notifications" this only checks if we have sent you a new notification, it does not check if your G2 Pod is up to date.