You can upgrade or downgrade your current GrabzIt Subscription at any time. To do so ensure you are logged into your GrabzIt account. Next go to the 升級頁面 and choose any add on's you require. Finally click on the "Upgrade" button to purchase your desired package.
After you have completed the payment your old subscription will be automatically cancelled. In addition to make up for any unused allowance from your previous subscription a free period will be added to your new subscription.