We added recently a new feature to the tool, that allow to automatically discover the ControllerClass, the fx:id and the Event handlers, when the java code is in the same directory than the fxml file.
This is the case for the IssueTrackingLite example.
So to take advantage of this feature, which make the step by step example much easier, one have to set the ControllerClass at the beginning of the doc (before the first fx:id is set).
Then, all the fx:id and the Events handler can be selected from the value editor ComboBox : nothing is to be entered by hand anymore :-)