Using the desktop version of the forum, use the drop-down next to your user name at the top of the screen and choose Edit Profile. Click the Your Profile tab, edit your e-mail address, then click Save at the bottom of the screen.
And for what it's worth, you can't have multiple community profiles/accounts; that's against the Terms of Service.
Thank you tikibar1for the assistance. I just realized the email address I used when setting up my community profile, I no longer had access to. Just needed to update it, so if any communications were sent to me, I would receive them. Thanks again for the help.