I too have been a fan of LibreOffice (and its evolutionary parents) for ages. It is so nice to share cross platforms and it does almost everything my fully updated version of Microsoft Office 2007 does. I do tend to use Excel and Access but just out of habit. MO has always been a clunky, sloppy-welded together assemblage of products, way overpriced, and with only a promise to someday work seamlessly together. I doubt it will happen in my lifetime! I will gladly put up with the small flaws in LO before getting another version of MO.
To the OPs issue though. I got what little bit of software is on this machine that is not free open source mostly at academic pricing so definitely track down a faculty member, staff person or student at MO, fully licensed will be around $90. No manual but that is common these days.
And scream! It is absurd that software companies dare charge retail customers 2-5 times what they do the academic community. The argument that this is because only 1 in 10 or 20 buy legit copies is nonsense. If it were fairly priced, nobody would race to get pirated copies. MO 2007 and 2010 are readily availed for $5-10 on the streets of NYC and Chicago.
And to the poster warning against putting pirated software on your machine? Thanks for being blunt about it. It is just plain stupid people and you will pay dearly for thinking you are saving $100 as your machine is so badly infected you lose it or worse yet it is enslaved as a bot.