Unable to change brightness after win 10 anniversary update

[Pertang]

Hi all

I have an AOC E1659FWU usb 3 external monitor hooked up to my Lenovo T440p laptop. It has been running fine under windows 10, but then the Windows 10 anniversary edition updated my laptop and I now am unable to change the brightness of the AOC usb screen. The display works fine apart from that, but since an issue I had a couple of years ago, I now need my screens to be more on the less bright side, my external monitor is set to really bright so it is basically unusable to me (unless I'm really in the mood for a nasty headache)

You used to be able to adjust the brightness via the DisplayLink control panel, but now when you go into the Displaylink task bar icon, if you select video, it just takes you to the windows display properties and you can't drag the slider on the adjust brightness. I've reinstalled the latest displaylink, but that hasn't helped and from a brief google search, I've come up blank. Any ideas or is this something that will be fixed in future editions

Thanks in advance
DJ