Thank you for your prompt reply. I am not sure what happened, but The Events Calendar PRO started working again after confirming my license was valid, that the current versions of the plugins were installed (even tried to reinstall). I did hit deactivate and then reactivate and maybe that is what did it. But I also contacted our webhost (United MEthodist Communications) about the problem, and perhaps they did something as well. Whatever, the full functionality is back. What a relief.
Again, thank you for your quick reply.
Ted Marcy