How to download Help files so I can work offline

I have just installed TC 15.62.2 on an offline system (licenses all legit).

But since it is offline, it cannot access support.smartbear.com for Help. It says to go to support.smartbear.com to download the files. But where? I've been looking all over the site but nothing seems to be what I need.

Where/How can I (a) download the Help files, and (b) get them installed on my system so that I can use them?

On another offline system, I have an earlier TC (14.something) that has Help, but I guess back then, Help came with the installation. It doesn't seem to do so now.

Thanks in advance.