New Domain Name - Same Upfront Installation - Broken Images

Hi there!

I recently moved gwgcap.flywheelsites.com to a new domain, gwgh.com - And have lots of broken images that still have the full gwgcap.flywheelsites.com domain.

I also noticed that my WPMU Profile is displaying the old domain as well - so here's the question: How do I update the domain for WPMU? Will logging out and logging back in affect my upfront installation?