As a suggestion, forget that your shiny new DAP is running Android. Forget that it has the ability to run any apps except for the bundled music player. Forget that it can connect to a WiFi network. Just use the product for the purpose it was created and nothing else: playing music. You'll be much, much happier.
This is probably the single best piece of advice for new DX100 owners out of the 11.000+ posts of this thread.