d. Wind speed - Wind wane
When you open a new presentation, a slide with the default title slide layout appears.
In desperation, and with the clock ticking down to the must-see Reds v Crusaders game, I gambled on running the 'factory reset' function, then reinstalling all the channels.
Result: success!
Might be a useful tip for anyone else who finds themselves with this problem.
<span>Cheers</span>