You can choose to either upgrade or downgrade your subscription. If you want to change your subscription, you have to log in to your profile on mossonstable.com. Choose Subscription in the menu. From this page, you can change your subscription. If you have chosen to upgrade your subscription, an amount equivalent to the remains of your payed period, will be deducted at payment. If you downgrade your subscription, the price difference will be refunded to your credit card.