How do I find an application that's already installed on Knoppix?

I have created a bootable USB drive with Knoppix. It works fine, but I was specifically looking for chntpw and a tool to wipe a HDD. This question is about where to find a package (chntpw) that Synaptic Package Manager says is already installed. How do I find an application that's already installed? I have looked through the menus, but I don't see it anywhere. Thanks, Jono