@ Volfman : Have you tried to take contact with Colorfly for instructions ? Also don't feel offended but have you tried the reset switch ?
@ All : Thanks for keeping the thread alive, I've been quite busy lately. Plus there's no real new info from Colorfly at this point. However I think I should point out that Fujiya, a good audio shop in Tokyo and the sponsor of the Headphone Festival last month, is now distributing the C4 and CK4. Prices are higher than China obviously, but if they feel the player good enough to distribute it, it's a good sign (they have never distributed the T51/SFlo2 for example, even if it's quite popular here).
I believe Fujiya store is not a real distributor of Colorfly C4/CK4. They only sell it. The distributor of Colorfly is MusicaAcoustics.jp
Dimitri is the guy in Charge of this company and he also owns a site for Export goods at musicaAcoustics.com
I myself been dealing with Dimitri ever since the Radius DDM came out. Highly recommended seller.
BTW, I just ordered a CK4 from MusicaAcoustics shop, will comment once I get it in..