Switching to another plan is easy. Go to Subscriptions section under My account and find your active plan there. You will see a “Switch” button there. Click it and select a new plan. When upgrading this way, you'll only pay the difference between what you already paid and the price of the higher plan.

If you are on a Free plan and don't have a subscription yet, just select any of the paid plans and complete the checkout.

Get in touch if you need any assistance picking up the right plan.