Line-in mic not working in Articulate Storyline

Yep, tried everything, including all of the above.  Thought I'd nailed it on Friday when it started working again, but now it's stopped.  There's nothing I've done within or outside Storyline that I can see would affect things.  I'm wondering whether another program is grabbing the device but there is nothing else running at the mo.  A mystery.

I am down to having to use a third party application to record and then importing the file.