Once you have logged in to your Client Portal ( https://clientportal.webfrogstudios.com.au ) using the email address and password you used when you signed up with Webfrog Studios, follow these steps:
Click on the My Domains link at the top of the page.
Click Edit next to the domain name you wish to change the details for.
Scroll down the page and click on the Contact Information button.
Change the details you want and then click on Save Changes at the bottom off the page.