Inspire 2000 V2 firmware upgrade failed

Hello, I tried to update the firmware to 2.2.2 via the Android Turbosound app. The connection between tablet and turbo sound is established (.. handshake ... erasing rom ...) but then the progress bar remains at 0% and the turbo sound is permanently in firmware mode. Unfortunately the firmware file cannot be loaded from the Turbosound homepage (error message on page, seems to be offline). CARE ticket already created, so far no feedback. Ideas why? Otherwise I send everything back to MusicStore, soon I don't feel like it anymore. Maybe someone can send me the firmware as a file and then try the Bluetooth share please. By the way: there are pixel errors in both displays, although the resolution is very low. Why that bad quality?