New Domain not New Host

Hello all I have recently changed my domain name ( Host is the same) and now store is not displaying correctly. Do I need to follow the same instructions here in order for it to work now? https://www.zen-cart.com/tutorials/index.php?article=100

this is the page I get now when trying to log onto admin I assume I follow the directions in #2

Your /includes/configure.php and/or /admin/includes/configure.php file contains invalid path information and/or invalid database-connection information.
If you recently edited your configure.php files for any reason, or maybe moved your site to a different folder or different server, then you'll need to review and update all your settings to the correct values for your server.
See the Online FAQ and Tutorials area on the Zen Cart™ website for assistance.

Or is there a better way to get it back to the way it was before changing the domain address.

Thanks in advance for your help.

What exactly has changed since you changed your domain?
Did you set up a new hosting account for it? Or are you using the same one?

If the ONLY thing that changed was the domain name, then all you need to do is change the HTTP_SERVER and maybe HTTPS_SERVER settings in your configure.php files.

If you also changed account names or did anything that changes the filesystem path to your site files on the server, then you'll have to edit other settings in the configure.php files as well.