Audacity 3 1 3 won't "run"

When I try to “play” or “record” the pointer stays firmly at 0.

Nothing seems to make it run.

In desperation I deleted Audacity altogether, downloaded again, first time I used it to record al went fine, Second time back to “frozen” state.

This applies to previously saved files and attempts to record new ones.

Any tips please - driving me barking!?