If you want to disable or delete specific Charge Types - so your Group members may no longer use them - head to the Control Panel (funkyfrog.web.app) and from the Menu select 'Static Data' and then 'Manage Charge Types'.
A list of existing Charge Types will appear at the bottom of the screen.
You can delete a Charge Type by clicking on the 'Reference' field in the table at the bottom of the screen.
Deleting a Charge Type means that it will no longer be available to your Group members to use. You, and your Group members, will however be able to see all previous payments made with that Charge Type.