Thank you, Joanna.
Your ability to restore 2018 inspired me to try again, and it worked!
Here is what worked for me:
1- I used the HR setup software to uninstall 2018.
2- Rebooted
2- Use the Settings to check for, down load and install the latest Windows 10 updates. The system rebooted after installation of updates.
3- Re-installed 2018 H&R premium and H&R Business and, it worked!!!
I has also installed the software to my daughter's and wife's laptops and it worked there too, bud did not want to have to wait for hiere downtime for me to use their computer.
Note - all other version of H&R work for me,. Best of luck restoring 2019