B&W MM-1 firmware upgrade 求救

Hi,

我係用B&W speaker MM-1, 佢係用usb連線的, 早排想upgrade firmware, 唔知係咪upgrade installation 得唔complete, 宜家windows 聲音播放裝置個度認唔到 (消失咗個icon), 但我都幾sure 個usb係已經連咗電腦了。多謝!!!