To change a Memberships name first login to Member App. Once you've logged in navigate to the Memberships inside of your Member App Dashboard.
Select the Membership that you want to edit the name of:
Click on the three dot icon on the right and select 'Edit Membership' in the dropdown menu.
Once you've done that the 'Membership' page will load. Once the membership page has loaded you will be able to select the Memberships name and edit it.