9000ft piano problem was to do with iOS file format and sand boxing. All solved.
Winter Voices is an entirely different thing. It just doesn’t seem to load on both Mac OS and iOS. It downloads ok and appears in DecentSampler ‘Browse’ and ‘File’ dropdowns but that’s as far as it goes. It then won’t load or replace a previously loaded sample set. It’s a mystery to me. I don’t seem to be alone with this as it is mentioned elsewhere on the PianoBook forum. As I have said, all my other ‘PianoBook’ downloads are just fine.