Go to Dashboard and click Browse User
Click the Green Edit button on the right of the users row.
Amend the details then click submit (Yellow Box)
First & Last Name can be edited Email can be changed but not removed, Active User (Red Arrow) is to change the status of their account, Access Code (Black X) cannot be edited)
Finally click Save.
PLEASE NOTE:- If you have added or changed the email address you will need to Resend Login Credentials.
I hope this helps.