Scans your wp-content directory for vulnerable instances of timthumb.php, and optionally upgrades them to a safe version.
After clicking "Scan!", you'll be presented with a list of all instances of timthumb on your server. Outdated or Unsafe instances are marked as such. Clicking "Upgrade Selected Files" will update selected files to the latest available version of timthumb available on http://code.google.com/p/timthumb/.