Keep 3.6.5 how to ...

The changes to LO4 may make you want to keep LO3.6.5.
It is easy to have both: just rename the LO folder, e.g.
"LibreOfficePortable" ---> "LibreOfficePortable3.6.5"
then add the LO4. After making the name change the prompt
for updating LO3.6.5 will not appear.
Duplicate files will appear in the program list, but hovering
the mouse over one will display the version.