You can update an incorrect email address on a registration. This can be done via the Wizevents administrative backend.

To get there:

Login to the Wizadjournal admin backend.

Click on the menu tab "Registration".

Click on the second action item, “attendees” (people icon) next to the event.
Go to the section heading “BY REGISTRANT”.
Click on “Manage Registrants”.

What to do:
Find the desired Registration by typing in a few letters of the Registrant’s last name in the “Last Name” search box and then clicking “Find Now”.
Check that you have the correct registration by clicking on the “View (eye icon)” option for that registration”. [click the yellow return icon to return back to the manage registrants list]
Click on the second action item “change email (envelope with pencil icon)" and update the email address.

Click "Save" to maintain your changes.

To Resend the Registration Notification:

Click on the third action item, "resend notification" (envelope with green arrow).