If you want to change your e-mail address, you will need to make a new account.
Send an invitation to your new e-mail address using the "invite teammate" button in the Team Panel, which you can open by clicking the top button below the Kosy logo in the left side of the screen.
An admin can remove the old account in the User Manager.
If you are still experiencing issues, please send us an email at support@kosyoffice.com - our support team will get back to you quickly!