Help editing Welcome page

Hello everybody,

Could I get some help figuring out how to change the ‘welcome page’ on a site using the ‘Thematic’ theme?

I know the issue may sound very simple, and please believe I’ve tried everything, but I can’t see how to change it. I’ve gone to Appearance -> Customize -> site info, and change to the desired name, but it doesn’t update what we see on the homepage…
I’ve cleared the cache as well. Tried it on different computers.
I’ve gone to the Theme Editor and see if there’s something to change in the CSS code, but haven’t been able to find where to edit the text…

The ‘welcome page’ also has a footer mentioning the original web designer, but I can’t find where that text is. Does anyone have a clue?

I’ve looked at several topics but have not yet been able to find a solution to this problem.

Thank you in advance.

The page I need help with: [log in to see the link]