I cannt delete all fields from the edit profile form.

Hi @helen-polise,

Fields with light blue background are the default fields. They cannot be deleted, but you can add/remove them from certain forms in next tabs.

Please read the Tips and Note Fields, that will help you with the addon work, also check Addon Documentation, you can find there all the info needed for the addon: https://wpforo.com/docs/root/addons/wpforo-user-custom-fields/