CC2540EMK-USB: packet sniffer on win 10 missing driver for the cc2540 dongle

Hi everybody , 

i have a cc2540 dongle and would like to use as BLE  sniffer for my BLE 4.2 application  ( based on CC2640R2 ) .

i m on WIN10 ,   I installed  packet sniffer   but  I cannot see  the dongle -->  it seems driver is missing 

coudl you help me ?

thank you 

best regards

Carlo