Hi Adam,
Where are you seeing WA/WebAssist branding in your PowerCMS installation?
I can't find any branding in my copy. The only thing I would change in mine, is the PowerCMS logo, which presents on the admin_cms/ login page, and at the top of the (logged in) admin pages. I upload my own logo (images/logo.png - 154 x 79px) to replace the existing one, or upload a blank transparent logo.png.