New theme crashed my site. :(

Luckily I’m working on a test site that I’ve set up with the express purpose of fiddling with while I attempt to find a new look for my main site. I activated a theme I had not tried before, TripleK2, and now I am greeted with the following error;

Fatal error: Cannot redeclare sbm_get_option() in /home/fjetsam/public_html/redesign1/wp-content/themes/TripleK2/app/includes/sbm.php on line 3

If anyone knows how to fix it to get the theme workable, that would be awesome. However, I’d just be happy to get the site to point to a different theme so I can access it again without having to set it up fresh again. Any ideas on how I could do either? I can no longer access the dashboard – the whole site is down thanks to this.