You can delete lines 120 - 131 so no emails are being sent. You can also change line 124 from:
$RecipientEmail = "".((isset($_POST["UserEmail"]))?$_POST["UserEmail"]:"") ."";include("WA_Universal_Email/WAUE_users_Registration_1.php");
to
$RecipientEmail = "".("youremail@domain.com") ."";include("WA_Universal_Email/WAUE_users_Registration_1.php");
to send the email to you instead. (remember you will need to replace youremail@domain.com with your email address)