Hi InlandAz and Glynn!
InlandAZ thanks for the Day 3 save. I installed the save and was able to play that level until the spaceship was due to take off. Then the game crashed back to restart and Day 1. That's close enough to the end to suit me.
Over the years I've played a lot of computer games DOS games included. (Only had DOS games when I started playing - Yikes! does that date me)!! This is the only game I could not get to run.
If it had not been for the kindness of all responders to my thread I wouldn't have gotten as far as did.
Special thanks to InlandAZ for sending me saved games, or I would still be back at Day 1.
Wishing everyone a Happy Thanksgiving!!