Stuck in Firmware Update .41 - Bike in DFU Mode

Hi, bought the trainer yesterday. Installed the Tacx-App on my iPad and launched Firmware Update. App Uploaded and installed the Firmware, but the trainer does not come "back" after hours....on the display i can see ony the bluetooth symbol and the word "update". On the iPad i can't connect with the bike, only the DFU device (is it still updating after hours ??) 

Tried to remove the power cord for the whole night and reconnected it, but same thing... 

Somebody knows what to do ? 

Thx

Stefan