To reactivate your account, log in and click on your name in the top right corner. Then, select the Billing tab and click on Reactivate under Subscriptions.
If you are having trouble with this, you can also reactivate by choosing your state in the following link and clicking on the orange "Start Studying" button: https://www.240tutoring.com/study-guides/.
If you'd like to use the same email address as before, remember to sign into your existing account first before proceeding to the payment section.