Certainly! In the event that you cancel the renewal of your subscription, but later decide to reactivate it, you can easily do so through the billing section of your account.
Simply navigate to Billing, then select Manage Subscription, choose the plan you had previously paid for, and click on Reactivate.
You will be presented with a pop-up box containing important information; once you have read it, select "Reactivate Subscription" to reactivate your plan.