When I click an mp3 from either Downloads manager, or from OI File Manager, then the mp3 player that pops up is this one (screenshot attached) I want to change the default mp3 player app to something else, but I can't find this app in my 'settings/Apps' to do that. It doesn't seem to be Google Play Music. When I go to Settings/Apps/Google Play Music/Opens by Default/ it says: Open supported links: ask every time Supported links: Open music.google.com and related URLs Other defaults: No defaults set It also isn't OI File Manager itself. I don't have any other music/mp3 related apps installed (except the brand new app I just installed, that I want to use as default instead of whatever the above screenshot is.) Does anyone have any ideas what I should try? Thanks. I could try deleting the 'open' prefs for every app I have installed, but, yuck. This is on a Moto G 2nd gen running Android 6.0.