The only way to upgrade your account is to signup for the level you want, using the SAME email address you use to sign in with. The system would put you on our $1 trial automatically.
Once that's done, you would need to send the balance amount directly to our PayPal account which is email@example.com.
Please add a description when you send us the balance payment.
When your done with the above steps, let us know the transaction ID of the balance payment and we will cancel your old subscription if you signed up through the credit card option, or, we will provide you with details on how to cancel your subscription through your PayPal profile if you signed up through PayPal.