Please note this is an old forum thread. Information in this post may be out-to-date and/or erroneous.
Every phpdocx version includes new features and improvements. Previously unsupported features may have been added to newer releases, or past issues may have been corrected.
There're a lot of changes on PHPDocX 3, so I recommend you to check phpdoc documentation. About the license, it's the same but you'll need to add to a config file instead of code file.