To renew your current AggFlow Design license, log in to your account at AggFlow.com, select the "Order Now" tab or click on Purchase / Renew Licenses on the website, and select "Design User." If your license is not shown, then click on "Add Existing Design Licenses For Renewal." You will be prompted to enter either your token number (from your USB key) or your user number and email. Follow the instructions at the bottom of the page to return to the purchase page, confirm the purchase amount and continue to the order verification and payment methods.