When I joined the forum over 4 years ago I used my work e-mail because you would not accept a yahoo address to register. I don't use the work address often and sometimes forget about it.

My question is can I now change my address to the yahoo one without breaking any of the rules. Thanks, Byron

Byron,
Go to your Public Profile (click on your name), and update the "Display email" box and put your yahoo email there. That way folks that want to contact you will see your yahoo address and use it accordingly. The address you registered with will not change, not an issue.