Hi, got my KF for Christmas and love it but am still learning. Now I want to change my Send to Kindle email address to ...@free.kindle.com. When I go to Amazon > manage your kindle > personal document settings > send to kindle email settings > there's the email address from when I registered "firstname.lastname@example.org". I want to change that to the free @free.kindle.com. BUT when I click "Edit" next to it, there is only a blank to change the text before the @ (my name) and @kindle.com is fixed with no way to edit. Please help. I don't need these extra charges for transferring my docs :-) What's wrong with what I'm doing? Thanks!