Advanced Guest Book - Editing Text

I am trying to edit the text in Advanced Guestbook 2.3.1 but cannot find the text in any of the files. I have searched all of them but can't locate it. I want to edit this "Thank you for stopping by my site. Here you can leave your mark." I also want to change "Sign the Guestbook." Can someone help? Thanks.

Amazingly enough it would be found in the lang folder in the file that is named after the language you are using, english.php in your case.

Thanks for your reply. If I looked at the FAQ's first for the guestbook, before I asked my question, I would have found it.