You can find the answer to this in the documentation. Scroll down to the bottom of the documentation in the area it talks about copyright. You basically have to change a file that is in templates/yourtemplate/html/mods… etc…
I’ll post the exact location in a minute.
Copyrights Info modification
To change the copyrights info, open the templates/ja_smallbiz/html/mod_footer/default.php file, find the following info and change to what you want.