Removing Start10 and reinstalling resolved the problem. The Windows 7 option and start button are working again. Hopefully the Windows 10 update for December will not corrupt Start10 again. Thank you for your help Island Dog.
Island Dog, thank you. I will give it a try.
Following the November Windows 10 Pro Creators monthly update, my Start10 menu configuration for Windows 7 no longer works. When I left click on the start button, I get the Windows 10 tile version. I have attempted to revert back to the Windows 7 menu, but the Start10 configuration will not modify the start button. Has anyone else encountered this problem after the November update?