This HelpViewX module is offered "as is". If you use this module then don't blame me if it doesn't do what you want or something goes wrong!
You can add it to your PureBasic project and use it without any changes. Or improve and modify the code to suit your purposes. If you make something different from it then please call it something else and make it clear that it's not the same thing.
Should work on Windows, MacOS or Linux.
It is very much built around PureBasic's WebGadget - so that must be working on your system!