I put on Ultimate SEO URLs and want to remove it

I have delete all of the files that were installed.. and put back if they were changed..

But when i go to my admin under CONFIG..

I still see the Ultimate SEO URLs tab (SEO URLs)

and it give me an error when i go to the page..

Warning: call_user_func(zen_reset_cache_data_seo_urls) [function.call-user-func]: First argument is expected to be a valid callback in /home/dir/public_html/admin/includes/functions/general.php on line 1544

JUST TRYING TO remove..

thanks