[telecom] transferring SMS texts from a W-8.1 phone?

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I've got a series of texts that are on my Nokia Lumia Windows 8.1 phone which I'd really, really, like to save in a usable form. Like on my computer. Or paper. Or something.

While I can find descriptions of how to save them to my m-soft account (that I set up just for this phone), and then restore them to another phone, I haven't found any method to get to those files and pull them over to my computer.

A typical m-soft info page is at:

Am I missing something obvious, somewhere, somewhen?

All clues greatfully appreciated.

Thanks