You don't renew the license... but just purchase a new one. You CAN purchase a new license now with the current promo code, but that will not extend your existing license for another year. It would be a new one. Since your license doesn't expire for a while still, you could wait. We run other promos, usually coinciding with major holidays and such. Just keep an eye on your email.
Nathan is no longer affiliated with DTH since the recent acquisition. You can connect with him and get any type of Joomla website help at
www.JoomlaEmployee.com
.