Way back when, the server that held the source code for the text importer got shut down. Since this blogging platform limits me to one attachment per post, I had to post the executable for everyone. I have received enough requests to let me know that this is a popular enough addin that people want the code. And since it is a fairly simple addin, it makes for a good tutorial (-ish) exploration into OneNote addins.
So here is the source code (attached at the bottom below my signature). It is only about 25K total.
Thanks for all the requests!
Questions, comments, concerns and criticisms always welcome, John