An existing Recurring Profile can be edited by navigating to Billing–>Recurring Profiles, and selecting “Edit” from the Options dropdown box next to the corresponding Profile. Alternatively, you can simply click on the desired Recurring Profile row in the table, and it will automatically open the “Edit” menu for that Profile.

It is important to note that you are only able to edit a Recurring Profile when the “Count” is at 0, meaning before the Recurring Profile has generated any invoices. Once a Recurring Profile has begun generating invoices, the Profile can only be deleted or "paused", not edited.