>>What is supposed to be used to open 7z files and why the name includes kor? I downloaded the advanced 64 bit version but don't know what to do with it. I have no default program opening the 7z files.
>
>Everyone should have / get 7-zip :)
>It does zip, 7z and everything else. It is good. And free.
>
>https://www.7-zip.org/
>
>
>The 7z format is smaller that zip.

ABSOLUTELY, "Everyone should have / get 7-zip :)"

Come on, people! ;) IMHO, 7zip is now the default zipper application.