I never quite worked out the relationship between Open Office and Libre Office. As near as I can gather, Open Office was bought by another company and made "Closed Office" whereupon the team left and set up "Libre Office". There was more after that, but by then I'd removed both from the PC.
I just carried on using my copy of MS Office 2003, which does all I need to do. I was given a copy of Office 2007 by a grateful "client", but after a couple of days I gave up on it and went back to 2003.
I don't need all those "dropdown" ribbons, and I like menu items to stay where they are, rather than moving around depending on what I'm doing. I've been assured many times that I can configure it and fix those menus to be the way I like them - but they are already that way in Office 2003.
I have the plugins that allow me to read X-rated documents (.docX, .xlsX etc) so it all works for me.
The only thing I can't do is get the spellcheck to work in French, German, etc but I can live with that. I do most of my "foreign" writing on the iPad because that changes the display keyboard to suit, which is a lot easier.