Drivers on website [1] are the same version as those on the CD (website last updated Oct 12 2014, CD received in Dec 2014): Broadcom BCM20702 Bluetooth 4.0 USB Device, driver version 12.0.0.8030.
Had to install twice - first time wasn’t prompted to reboot, so nothing worked. Upon reboot, device worked perfectly & connected easily.
HOWEVER, Windows uninstalled my Intel BT drivers, so when I wanted to switch back to my built-in bluetooth driver (Intel® PROSet/Wireless Software for Bluetooth® Technology) I had to reinstall that, which in turn disabled the Inateck device (Broadcom) in Device Manager > Bluetooth.