Hello,
The library is working perfectly as explained on the documentation.
The trial package is crypted and can't be debugged, so there's no support of the trial package but for general questions and minor doubts. We recommend you to run the included examples to check if the library is working fine.
If the styles are not being applied is because in your script or DOCX there must be something wrong: maybe mispelled styles names, wrong styles in the DOCX source... We'd need to check it directly.
We're happy to help, but to check custom scripts a license is needed.
About environments, as explained before, all licenses allows to use the library in localhost and private networks (classes A, B and C) beside the purchased subdomain/domain/IP. These are the environments we consider for development.
Regards.