Can an audio file created and exported using Text to Speech (TTS) in Storyline be re-imported and maintain its TTS feature?

I have a very large project for which I had created several Text-to-Speech audio files in Articulate 360. Note, I had to downgrade to an earlier version of 360 to meet some unique circumstances for this particular project - it is still 360 just an older version, i.e., not patch updated to the current patch.

I exported the audio files, and now have to edit them. Unfortunately, I keep getting an error that the Articulate project file I used to create these audio files was created in an older version. I have not changed my version so not sure why I keep getting that error.

At present, I am able to open a slightly older version (backup from a week ago) of the same project without any problem. However, if possible I would like to avoid to try and recreate the entire TTS library.

So, I was wondering...

Can an audio file created and exported using Text to Speech (TTS) in Storyline be re-imported and maintain its TTS feature? I tried it and didn't find it to be the case, but perhaps I am overlooking something.

What would be a workaround for the future so as to not to go through this process (aside from keeping a Notepad file of the TTS text)? Does Storyline allow you to export the TTS text?

Thank you.