Login to the Hike platform
Click on your name in the top right hand side of the screen, and select settings from the dropdown.
Scroll down the settings page to the Subscription box. Click the "Change Plan" button.
You can now change the billing cycle for your current plan. When you have selected the plan you want click "Change Plan";
Your plan will now be updated :D.
You can only update your billing period and not the currency you are using to pay once you have signed up.
Any billing changes will be billed in advance, any overpaid amounts will be taken off future payments.
All billing changes will take place immediately.