Nearly everything greyed out [SOLVED]

MacBook Pro 2009, OS X 10.10.5, Audacity 2.1.0

I downloaded a fresh copy of Audacity but found initially that I couldn’t change Devices from inbuilt Mike to the Combination Input from the Device Toolbar. I went to the Audacity Preferences but found they were greyed out.
Exploring further, I find that everything under the File menu except Open Recent & Import are greyed as are quit a few other possibilities on the menus, although they may be because a project hasn’t started yet.

Can’t find anything in FAQ or Forum search. Any suggestions?

Ensure that playback is “stopped” and not just “paused”. Click the “Stop” button.

That did it Steve. Thanks.
(I didn’t even realise it had been turned on…)