FAIW... (hope I have my facts straight)... there are many people turning away from SketchUp since their changing to the subscription system and basing the free version through the internet, however, if there are any out there that want to get their hands on the freebie PC version, I may be able to point them in the right direction... even though it is free, Trimble have stopped distributing older versions to -2.
I may be able to help with:-
2016 - last free version PC based, supporting 32 or 64 bit.
2017 - last free version PC based, supporting 64bit only.
2017-2021 - Sorry, only Pro versions (unless you have a license).