I have the latest WP installed. I have old domain and new domain pointing to the same directory on my server so in effect, both domains are working. Can I not just change the domain name in Settings > WordPress address (URL) and > Blog address (URL)?
If not how do I do this without corrupting everything? I have backed up the database using WordPress Database Backup 2.2.2 by Austin Matzko.
I found a how-to on here but it was so complex I was hoping it was old and that the new WP would have sorted this out.