My Pure Connect internet radio stopped working on 1 February 2017.
I eventually found that a non wifi USB upgrade was needed from the Pure support website.
My Evoke flow has been upgraded to Ver. 5.1 and the internet radio is working again.
The USB upgrade by PC or Mac would, I think, be beyond the ability of many users.
I contacted three friends who have Evoke Flows.
I upgraded one, but had problems with setting up the wifi because WPA not WPA2 was needed.
The other two had moved on to using their iPads and weren't interested.
Did Pure really have to do this?