Shoutbox

Hi, I'm new to this whole messenger plus thing, so forgive me if my question sounds stupid.

What I need to know is how do I uninstall plug-ins that i have install? I mean I deselected the plug-in in the preferences tab and restarted messenger, but it's still there after the restart, how do i completely remove it?

Thanks in advance to whoever is taking the time to read this and helping.