How to install help file to Libreoffice 7.2 portable

I downloaded the help file from LibreOffice homepage, but I cannot figure out how to use it. I’m being asked how I want to open the file. Out of all offers, I tried LibreOffice writer, but nothing happened. Anybody got a hint? I’m on Windows 10. And I’m using LibreOffice 7.2 portable.

May be this can help you:

Hey anon, thanks so much for your answer. I am very delayed, I know, a lot of things crossed my investigations about the help file. But I will let you know as soon as I succeed.