There is not a process to change the email address associated to your BrightID. 

If you have a subscription account:

• Add a new user with the updated email address, this will send an invitation via email using the new email address. If you do not have permission to add users, please speak with your administrator. 
• Complete the set up for the new user log-in to the account with the new email address.
• Remove the user record with the old email address.

If you account is pay as you go:

• Contact the support team on support@informdirect.co.uk - please state that you are a pay as you go user needing to change your log in email address.