Ah, maybe cleared caches recently, fixing a problem with another app. I'm willing to believe that's it. Probably haven't used it since then. Will check to see if problem re-occurs. Thanks for the response. Cheers, Simon.
I bought the full version of Poweramp. I have been using it just fine for months. However, it just refused to play anything because it couldn't connect to the internet to check the license. This is really unacceptable.