Hello,
We have downloaded the Basic package and run the included examples and there's no trial messages in the DOCX outputs (the Basic package doesn't include any trial message).
Please download again the package, extract it in a new folder and try running one of the included samples (such as examples/Core/addText) using PHP CLI mode:
$ php sample_1.php
And then open the DOCX output. Maybe there's some cache in your server or you are loading the trial package by mistake?
Regards.