The admin email address for your account is the email address that you use to log into your ReferralCandy account. It is also the email address that ReferralCandy sends various administrative alerts or emails to. This includes invoice emails, coupon expiry alerts etc.
To change the admin email address:
Go to your My Profile page
At the "Profile settings" section, enter the new email address at "Admin Email Address"
Click Save Changes.
Note that a verification email will be sent to the new admin email address after the changes are saved. You'll have to follow instructions to verify the Admin Email address before it can be used.
Related article: You are also able to change the email address that campaign emails are sent from. To learn more about how to do so, check out this article.