Domain name change problem

I'm somewhat of a newbie to WP Multisite and BuddyPress. I'm building a community site for my internet broadcast network. I started installing everything on a spare domain...http://myad70.net. With plans to switch it over to my primary domain http://ad70.net. Got enough set up to familiarize myself with multisite and buddypress and thought hey...Let's switch it over now. Well...I made every possible change I can think of in the Dbase and WP. Yet my "Home" link will not change from http://myad70.net to http://ad70.net.

I've searched in both the Dbase and CPanel and there are no more instances of "myad70.net," anywhere.

I've disabled all the plugins...Changed themes...Still nothing

Is there some backend cache somewhere that I don't know about?

Thank you ...Michael J Loomis