To change your Behaviour Account email address, you will need to sign into your Behaviour Account here. Once you've signed in, click on "Account Details" on the left-hand side of the screen.
Once on the Account Details page, click the pencil icon next to your email address:
You may now enter a new email address in the pop-up window:
After doing so, click "Confirm". You should receive a verification code in the inbox of your new email address. Copy and paste this into the verification box to confirm the email change - but be quick, the code expires after 5 minutes!
Now simply click "Confirm" again and your email address will be updated!