Yes, upgrading for monthly or annual subscriptions can be done at any time. The system will calculate the upgrade price automatically.Downgrading a monthly subscription can be applied at any time, but the downgrade will occur on the next subscription renewal date.Downgrading an annual subscription can be applied for at any time, but the downgrade will occur on the next subscription renewal date of the following month. The system will calculate the downgrade price automatically. Any refund due will be handled by our Accounts Department.You cannot cross grade from Monthly to Annual or Annual to Monthly.