Thank you to all who helped! Problem solved.
For those interested:
Problem was moving from XP computer to Windows 10. Everything seemed fine except Open Tracker had the message "Open Tracker Open"
Thanks to help from this group, I found that Windows 10 had COM1 at 19,200 BAUD. Changed that to 1200 BAUD, restarted everything and now it's "Open Tracker OK"
This is a great group. Solved in less than a day!