Sam, why is it always the simple things :-)
I found a simple link that allowed me to test the openweather api link:
http://api.openweathermap.org/data/2.5/forecast?id=524901&appid={API Key}
I saw the 2.5 and changed it to 3.0 and got a 401 error. I changed it back to 2.5 and it worked. I tried commenting out the 3.0 & /onecall items in config.js and got a “config.js not found” error when running MM. I had used (/*) in the leftmost column as a ‘ignore line’ comment. So, I deleted the 4 lines from config.js and it worked fine except for a teensy error “displaying Howe instead of Houston” in the display. I have no idea where that came from. I wonder why the fourth largest city in the US isn’t listed in the pull-down menu?

Now, I’m going to see if I can add additional modules.
Thanks for your very patient help!!