You need to run my update script. The update SQL function supplied is incomplete as it does not alter the admin or other tables. You will find the script at www.carbonize.co.uk/AG and all my mods are in my forum.
I actually found the TC forums by googling and joined the forum to answer a post about my image verification. I then hit a spot of bother with my hosts (my virtual server got hacked and they wanted to charge me $2 per GB of used bandwidth and 90+ GB were used. 60 in one hour even though they admit this is impossible) so left them for TC.
Your initial post indicates to me that your admin has been accessed and used to alter one of your templates. url.php is the template they usually alter. If you posted it on the TotalChoice forums then I will answer there at some point soon as I am a TC customer as well.