I have a Designer I and it's remarkable. Saying that, I got the 3D Pro software using XP. Yep, my XP still operates. If you want to use a DI and not buy software, I'd suggest finding out how much it will cost you to switch from floppies to USB port. I got a case of floppies and buy my designs from Embroidery Library so switching isn't an issue yet. The first think I'd do to test it is stitch out every programmed stitch. Then I'd use the floppies you got - you should have 5 floppy disks and stitch out samples in each hoop size. Just a thought and good luck. You can PM me if you want to talk more.