Spotify doesn't work on my Ipod anymore. When I go to the app center and download it, is says that it isn't compatible with my IOS. But I can install an older version. I get to choices cancel or install. I press install hoping that it will install the older version that will work on my Ipod. However it doesn't do that. So my question is, where can I find the older version of Spotify that will work? And how to install it?