plug-in left something after removing

After trying a tweet-like plugin and deleting it  it left some text at the bottom of all my pages even after it had been deleted. Now I don't manage to get rid of this text: [tweetandlike_buttons size="standard" type="horizontal" align="right"] . Can anybody help me? Please.  You see it at the bottom of every page of www.clown-okidoki.nl and it comes from the plugin:  Tweet & Like by kurt Polinar