It seems to be a demo
Although I paid for this, it emits a burst of white noise every now and then. This is typical of an unpaid demo for audio applications, done so you can try it out, and then pay to get a key to remove the white noise. Either this is an error, or its a bait and switch. Either way, its not usable as it is.
NigTuf about
Audio Plugin Player, v1.3