in previous versions, you can add a hidden field and use it to have a default value of the users email address. Set that field to have the class, EmailField

From there, you can use the following to copy the value and store it into the field for the email:

$(document).ready(function () {
   var userEmail = $('.EmailField input').val();
   $('input.saveresumeinfo:nth-child(2)').val( userEmail ); // Set the email address
}