Yes, you are correct, this file is missing in the installation package. I'm attaching you the content of the Example.xaml. I hope this will help you to create a recursive tree view.
However, you should be able to see it at following link http://demos.telerik.com/wpf/
, when you navigate to "Controls/NAVIGATION/TreeView/Data Binding" example. Have you closed your browser before clearing the xbap cache?
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