Thank you for your rapid response, Andre. Unfortunately I guess I'm not tech-savvy enough to follow your suggestions. Actually, this keyboard has been working on my Windows 10 Keyboard for a couple of years. I must have done something that stopped the 5 Favorite Keys from working and I really liked that feature. I thought reinstalling the software would fix it, but that didn't work. Thanks anyway for your suggestions.
Jim Archibald "83 year old junior tecky"