It is actually quite simple, you just need to be able to login into your account so you can change the login.
First, log into FB account, then open a AMZ.com page in a second browser window, close FB window but do not log out. Check that the account ID at the top left of the screen is showing as numbers and letters, then check that you can access your character on your server.
This will mean that you are logged into AMZ servers using AMZ.com with your FB account.
1) Login to AMZ and go to the left side of the screen to the icon under the house icon or Click on this link
2) Click on edit email. Please make sure that you have a Gmail / Yahoo email.
( hotmail / live mail are blocking the verification emails on their mail servers, we can not fix it and they will not change it )
3) Change to the new email
4) click on Edit password and create a new password ( players may have to change the email then go to the login screen and click on forgot password, the system will give them a new password
This has the added advantage that players will be able to access and post in the forums. It is not possible to log into the forums directly, you need to log into your AMZ account then click on the forum link to be taken to the forums and logged in automatically
THIS will not work if the email has been registered already for a different AMZ account!.
Some players have reported that they have been able to use their existing FB/GM login and clicked on Lost Password on the main AMZ page / or using the edit password option and generated a new password so they can continue using their existing FB/GM with a new password so they can log in with email and password. This is not a quaranteed safe way of doing it and can result in issues with players finding they can not access their characters and account.