Sure thing! Go to My Subscriptions in your account or in mInstaller and click Change plan. We will show you the calculation of the credit you get from the unused days from your current plan and how much you will have to pay to move to the target plan. Your new subscription starts as soon as we collect the payment and covers your chosen plan/billing cycle. Important notice - we do not process downgrades (annual to monthly or 2D + 3D to 2D).