You can change your billing cycle at any time through your billing dashboard.
Yes! Simply log in to your Kodeco account and follow the 'Manage Subscription' link on your account dashboard here: https://accounts.kodeco.com/
You will be asked to confirm changes on your account, including agreeing to the amount of your charge, when you'll be charged, and what your new renewal date will be due to the request. Once confirmed, the change will be immediate and you'll then be on the new billing cycle. See how to do this here:
Having issues in upgrading? No worries, send us a message here and we can take a look at what might be causing problems.