Supposedly EZPiano can store a tune as a MIDI file with a .mid extension, so I tried that. When I told Noteworthy to open that .mid file, it said that was an illegal operation and the program would be shut down. (Next it will try to sell me the Brooklyn Bridge.The man who produced EZPiano, Andy Kula, doesn't seem to be in business any more, so I can't ask him for advice.
My friend the Computer Wizard sneers at EZPiano, but I think it's a neat program. For example, I can play a tune and it will gamely make a stab at printing what I played -- no tedious entering of one note at a time. Noteworthy doesn't seem to do that.
Also, EZPiano is perfectly comfortable with off-the-wall times like 9/8 and 5/4, and Noteworthy doesn't even have them on the tool bar.
However, Noteworthy seems more compatible with the Internet, and it prints a more elegant copy. That's why I wish I could get these two programs to swap pieces.