How to save your decision tree.
Choose Menu File - Save or File - Save as.... The native file format is ITR, which is in fact XML. If you are using XML aware software, like the recent versions of Microsoft Excel, Word or Internet Explorer, you will be able to open the files and further process them, e.g. to create a report on your decision tree.
Open the ITR file in Microsoft Word and it will look similar to the following:

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