[dvst8_]

WM 6.1 added threaded txt msg.
So far the only way I’ve found to read restored inbox messages from 5/6.0 is to turn off threaded text messages.

You can do this with this registry edit

[HKEY_CURRENT_USER\Software\Microsoft\Inbox\Setting s]
"SMSAvailable"=dword:1

Change the :1 to :0

I ended up getting the information I needed from the old txts then turning the threaded messages back on.
You won’t see any new txts while threaded is off when you turn it back on ether.