Can't disable Komento

I installed a Template Monster template (#50489) which had Komento pre-installed. My install won't need Komento, so I'm trying to remove it.

1) First, I tried to go into Komento integrations, and click on "Joomla Article". Then I clicked "Enable Comments: NO" But the little comment icon still appeared in the metadata area above each article. It isn't clickable, but it is still there. So, next, I tried...
2) I went into Extensions => Manage, and located all Komento items and disabled them. But that broke my site... bad. I get this error: Fatal error: Class 'Komento' not found.

So, how do I get rid of Komento?

http://seiincj3.org.s78299.gridserver.com/