Download this firmware and run it on a Windows system to flash the hub. Make sure the hub is connected before you flash it.

https://www.vantecusa.com/CKEdit/images/files/Usb3HubFWUpgrade_Setup_V1.1_VL811_0983.exe

Here is a zip file with multiple version of the drivers including the latest.

Please download, unzip into a folder and check out the readme file for more info.

Click Here