[Plugin: Facebook Like Button For WordPress] Plugin when deactivated breaks site

The plugin has an area where you can select to view the facebook like button on the first page only, but it does not work. When I tried to deactivate the plugin, it completely broke the site. I tried to contact the developer via their contact form, but that is broken as well. You may view the site here:

http://zigfieldtroygolf.com/

Tanya

http://wordpress.org/extend/plugins/facebook-like-button-by-kms/