Hi 
LibreOffice actively develops 2 branches alongside each other all the
time.
The "Fresh" branch is the default one and tends to be more developed in
terms of new functionality and better handling of documents created by the
newer versions of Microsoft Office. On the other hand sometimes some of
the new things do create unexpected problems.
The "Still" branch has focused on fixing problems and doesn't add new stuff
so it is sometimes better for several different types of environments. I
install "Still" on all my colleagues' and client's machines but try to use
"Fresh" on machines that i can reach quickly and easily to revert back to
"Still" if necessary.
It is even possible to install both versions on a single machine but i find
it easier to just uninstall and then reinstall the other. That way
whichever version is being used picks-up on the same settings = so i don't
have to reconfigure anything.
If you go to our download site you will find you can change the version to
download. It is a good plan to have both the latest versions, one from
each branch.
Good luck and many regards from
Tom 