If you no longer use the email address you used to sign up for Hatchlings, use the following steps to update us. This is the address where we'll send support ticket replies, round reset notifications, and any other game emails you subscribe to.
To change your email, go to Settings (the gear icon), select Profile, then click on Change Email.
That will give you a window to enter your new email.
If you have already tried to change your email address, you will see something like this, which lets you enter a new email address or resend the verification email.
The option to cancel a pending change (if you made a typo entering it, for example) only appears for people who have already verified an email address. If you don't see it, just use click "Change Email."
About that verification email: if you know you entered your email address correctly but still don't see the verification email from us, try searching your email for firstname.lastname@example.org. As you can tell from the address, you can't reply to the verification email -- you have to click the link in the message.
Check out our article Contacting Hatchlings Support for how to get the most efficient help.