Thanks so much for your suggestion … but found the problem and all is OK now!!
What I had done was:
On the left, under upload option, I selected the first of Ben’s files, and then did that again for the other of his files. Today I realized that I had overwritten both of his files with the original code! So I had been rewriting the original code back to the nano when I did the “upgrade”.
Today I unzipped his zip file once again and loaded his code using “upgrade”.
The nano is now working with Ben’s code.
By the way, I didn’t see source code for Ben’s work. Am I not looking in the proper place, or is he not releasing it?
jim