Calendar Entries are gone and I cannot sync

I am using Windows Live email 2012 program on my computer and I am logged in to Windows Live Mail. The problem I am having is I created my Windows Live Mail login with my email address and that email is no longer valid. I went into Windows Live Mail and changed the email to my new outlook email but when I did that all of my calendar entries disappeared. So I went online and created an alias using my old email and logged in to Windows Live Mail and now the calendar entries are showing again. How can I remove my old email (alias) and keep my calendar entries? I have my outlook set up in Windows Live Mail as a IMAP server. Any help appreciated!