Nothing helped. The thing is just a dog. It's going back.
Spoken to JL, no problem returning for a refund.
Cleaning up the box (format & reset) before sending back summed it up perfectly. Even the reset with format didn't work properly first time. Personally, I just think the whole UI is just badly coded and horribly inefficient. As I say, if a cheapo Rasp Pi can be turned into one, there is no excuse for a £200+ specialized device to be this bad.
Been using the T2 since yesterday. If the 5000T ran at a similar pace, I'd have been happy. Lots of functionality (even if a lot of it is very buggy) is fine. But not at the expense of making the whole user experience so bad. I mean, a second hand, cost me £40, over 5 years old, box from the same people is putting it well and truly in the shade.
A shame really.