If you want to change the email address associated with your FileFactory account, simply follow the steps below.
You can change your email address to a new one even if you don't have access to your old email address anymore. You just need to know what your old email address is, your Date of Birth, and your existing password.
Sign in with your existing email address and password, and then go to your Account Summary page. Then scroll down to the Email Address field and click "Edit". Verify your Date of Birth and then type in your new email address, and then click Save Changes. You can now sign in to your FileFactory account using your new email address.