Which version of html executable required for protect ebook service

I did serach for this answer… but nothing at all showed as a result…

I want to buy HTML Executable right now and wondered if anyone could advise do i buy the Pro or Commercial version if I want to use Protect Ebook service?

I see the Commercial version has…

“Hardware-locked” Registration Keys for Ebooks
Online Activation Kit

so I wanted to make sure I am not doubling up by purchasing the Protect Ebook service also…

and finally… do I also need to purchase Paquet builder to complete the full ebook process?

Both Pro and Commercial versions work with Protect Ebook.net

No, Paquet Builder is optional.