Don't know if I would trust the download link on that site though. It "looks"
like an official IBM download. I would be surprised if IBM just dumped it onto
the PC market for free, but IBM sold off the PC business quite some time ago so
it is possible.
I had a Windows 7 ultimate edition I did manage to install it on. Other version
of Windows it would jack up. Maybe Windows 10 got a bit better about being
backwardly compatible with software really written for 98 and barely updated to
run on 2k? Best to set up a VM with an old copy of 98 or 2k.
The file cabinet drawers were a really nice touch. It made everything feel
completely integrated, especially with Organizer and email. It was and is much
nicer than opening the LibreOffice main application and getting a list of apps
down the side and a screen full of document images.