Wordpress Site Move from a Subdomain to Main Domain Name

Hello

I have a site that is setup under a dev.domain.com under a Media temple DV Server running plesk. The client is now ready to launch the site, how do I need to go about migrating the WP site over to the main domain.com? I tried taking a snapshot, and everything seemed to work with the exception of the revolution banners. They are linked correctly it looks like, they just are not loading on the pages? Any ideas or is there a better way to move the site over. both the subdomain and main domain are on the same server. I haven't deleted anything yet.

Thanks so much!
Cody