Typical, never had a problem with buying software. Could be a Paypal connection issue on their part I suppose. I can’t try again because it tells me there is an existing ongoing transaction, but after 20 mins I don’t have much hope that the first attempt is going to work.
But now that I’m trying to get support, I realise they don’t have an appropriate section for this. So I have raised it as an issue, but under a different irrelevant topic. Ah well!