Jsplumb remove all connections not working with verion 2.4.3

I am referring this example.

which uses jsPlumb version 2.4.3, I wanted to remove all connections but its not working, To remove all connection Ia am using this code.

jsPlumb.deleteEveryConnection().

To remove single connection I am using below code but it showing .detach is not a function.

 var instance = jsPlumb.getInstance({
     DragOptions: { cursor: 'pointer', zIndex: 2000 },
     Container: "canvas"
  });

instance.bind("click", function (conn) {
    instance.detach(conn);
 });

Is there any version issue with jsplumb.

Any help would be highly appreciated. Thanks

var instance = jsPlumb.getInstance({
         DragOptions: { cursor: 'pointer', zIndex: 2000 },
         Container: "canvas"
      });

To Delete all connections try :

instance.deleteEveryConnection()

To remove single connection try:

instance.bind("click", function (conn) {
    instance.deleteConnection(conn);
 });