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.
Yes, the latest version of the library allows to update the values of custom properties. But you can't use the trial package to change the properties of the DOCX as they are overwriten; you need to use one of the purchased licenses.