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         DDJ 2.5
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+ Works with Windows, Linux and Mac. 
+ Can debug programs without using the database (the database and the caches architecture is automatically used by the debugger only if it detects a database in the system). 
+ The tree compression and the balancing techniques are now compatible and can be used at the same time. 
+ Contains new hybrid strategies.
+ Implements Optimal D&Q. 
+ Implements the memento pattern for undo and redo cappabilities. 
+ The pannels in the GUI with information about nodes have been improved and they now show the information more readable.