Is the $40 State Income Tax Upgrade for Deluxe usable only for one e-filing?

I purchased TurboTax Deluxe without the state income tax by accident and now (obviously) it's asking me to upgrade to do my state income taxes. If I pay for the $40 upgrade will that upgrade only be usable for one state income tax e-filing (mine) or can my father and girlfriend also use it when they file their taxes using my program.

 

Thank you!