How do we change our email within the OR system?

How do we change our email within the OR system?

If you mean the main email (that you login with and/or get notifications at) do that under the Account > Profile page. That's the top right button, then Profile. There are many other "email" settings in the system though, so let me know if you meant something else. Theming, etc.

Hi, I would like to change it in other settings, like my hosted website and reply from email.  Thanks.

Try going to Settings > Theming. That should take care of it.