You can download FC from the Mimaki site - there are umpteen different versions depending on whether you have Win7, 8, 10, and which version of Corel Draw or Illy you may be using.
There's no one-version-suits-all.
But getting it to work is the test.
The win 10 version needs extra windows files and I think generates its own release code. I'm sure I tried it and eventually got it going - except Win 10 does not work with Corel X3 which I prefer for plotting.
I had it going with X5 I think, & win 10 on a Dell, till the hard drive failed, and I went back to a Win 7 dedicated PC for the plotter, and a KVM switch.
You need to name a blank CD appropriately - I forget the name needed - I thought I'd replied to this a few years ago-or someone else had.
You'll also need the Mimaki USB 2.0 drivers downloaded, I think, and some other file - but that's for the plotter rather than for Finecut.
I ran a Ghost type program to make a HD image of the setup, once running.
Our original FC cd is cracked in the centre, sadly, from being removed badly from the case.
I think I also started with FC 7 and Win7 ,and loaded that, then upgraded to 8 with the upgrade.
I had a feeling with Win 10, the FC 7 would not work, and the CD labeled Finecut would not work - I had to name it something else that resembled FCWIN08 or similar mildly obvious codename. Then it generated its own unlock code eventually - took 3 attempts.
Hence I am happy with the Win7 version.