They’ve recently changed. I have a 4 year old computer and when I bought it, I bought a downloadable copy of Microsoft Office through my wife’s company. However, NOW you must pay $69 per year to get the license.
I don’t think there is anyway to move them to a new computer. Well, you could always take the hard drive out of your old computer and add it into the new computer as a secondary drive.
But the 365 license is pretty nice. You get 1 TB of cloud storage and this is accessible from multiple devices, so if you have a tablet or a laptop and desktop computer you can have access to your files.