How can I reopen a Notefolio file? Notefolio Error Message: "The file is corrupt or not a valid Notefolio File"?

I have installed TI Connect 1.6, Framework 1.1, and the Notefolio program. I am able to create new notes and save them as a .txt file or a .8xv file. Notefolio does not allow me to reopen saved notes and an error message pops up. How do I fix this?

Below are images of me creating a Notefolio .txt file, then trying to reopen it...

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