Editing "Powered by WordPress and Designed By" line

On our newest blog, http://thewoodlandseats.com, in the left sidebar there is a line that reads, “Powered by WordPress and Designed By Oobor.
health directory / Ice Cream Maker” – we need to edit this line as it contains a broken link (which is also an irrelevant link). We have spent hours searching all of the theme files and cannot find the code for this line in any of them. It is not in the function.php file. It is also not in the footer.php – presumably because it’s not in the footer at all. We thought of contacting the theme creator, Oobor, of course, but their site has no contact information (in fact, they don’t even use one of their own themes for their website). Any help we can get in modifying this line of code would be appreciated.