I don't know how to save the file in the Freedom edition. My available options are not the same as those described in the links you shared.
In the article by a man who had the same problem he says that he resolved it like this:
"The support expert helped me use a little-known feature to get my data out of the Free File version of TurboTax online and into the paid product. I exported my data into a TurboTax export file, paid for a desktop version of TurboTax for Mac, and imported my file into the desktop version."
Can you share step-by-step instructions so I can replicate that resolution? Please--I'm losing my mind!
