How to use LibreOffice built-in help?

I have downloaded both the LibreOffice Main Installer and LibreOffice Built-in help and installed them in order. While accessing help within LibreOffice, I’m always directed to online help, which needs internet connection and is difficult to find what I want. Instead, I would expect an offline built-in help like that in OpenOffice. What have I done wrong?

make sure to use the same language of the helppack as you use for the user-interface - Why can't I access offline help in LibreOffice 3.5.2.2?

You might need to download the helppack which works with your LibreOffice version

I have downloaded the Help Pack associated with the Main Installer, of course, and instlled it right after installing LibO with the Main Installer as suggested. The Help Pack doesn’t work for 3.5.0, 3.5.1, and the new 3.5.2.2. Strange enough, this same question is asked by many poeple, and so far no satisfying answer.