Correct documentation for V6.2 programs

I recently installed the Ultra Office for Free App from CompuClever
which uses the LibreOffice software. When I asked them about
documentation and help, they referred me to your website. From within
Writer, I clicked on a Help button in a dialog, and then selected the
'read online' link and it connected me to your site and displayed help
for V6.2 on my desired topic. Later I went to your English
documentation page and I notice that there are documents for several
version numbers, 7.2 being the latest. I would like to get some users
manuals as references, but I what them to be relative to the program
version I have and cover its full functionality.
I have gotten caught before getting the manual for the latest version
which did not cover a function that was in the software version that I
was using but had been removed in the more recent program version.
My question is since it seems that my Ultra Office is V6.2, should I
get V6.2 or earlier documentation or should I get the latest version
documentation?
Thank you for your time.Gary Smith

UltraOffice is not from LibreOffice. This question should be directed
toward your source at UltraOffice that pointed you at the 6.2 version help
files.

But If you select Help-->About LibreOffice, you should see a version
number. That number represents the version number which the help files are
documenting. If the Help/about screen shows an Ultra-office version number
instead of LibreOffice, and doesn't also show what version of LibreOffice
it was forked from, that's a question for the people who made UltraOffice.

What you've suggested SOUNDS like the right path (LO 6.2 help files are the
right ones to use.) However, no one at LO will be able to be more helpful
than this. If you want to be more sure before spending on printed
versions... confirm with UltraOffice people.