Seems a bit dumb to be replying to myself, but even dumber not to ...
Hopefully someone else may benefit from this meagre scrap of information.
I've noticed that among the hidden folders and files on my Desktop, there is a folder named .BAHtemp-363-1804289383. Inside the folder is a file named .BC.kj1FUe. This file seems exactly the size of my WMA file which Express Scribe seems to have eaten. The file's date matches the last time I tried to use Express Scribe. Unfortunately, I cant find a confirmation of this file's creator.
This file will not open. I tried attaching a WMA extension to it, but Media Player wouldn't recognise that either.
I have copied it for further forensic work when I have time.
Anyone find these names familiar?
Steve