Thank you for your answer. Though I've been using AirPlay mirroring for years with nplayer, and obviously, when watching a video, I think it's better and logic if playback pauses when you go back to home screen for example. Hope you can at least incorporate a setting to allow that.
It seems that your purchase is not displayed on the history of App Store even though you actually made a purchase. We think it might be Apple's mistake.
We do not have an authority to see the purchase history. Please remove and reinstall the app, and if problem is not solved, please contact the Apple company with your purchase history for further information. Here is how to check the purchase history in iTunes.