Monitor Not detected anymore

[Jacq]

Evening

I am wondering if anyone can help

I had been using a display link adapter on my MacBook Air (2013 version) to use 2 external monitors and it was working fine up until recently when my MacBook updated softwares to Big Sur.

I have downloaded the new Display Link Manager software but for some reason it doesn't seem to detect the second monitor anymore.

If anyone has any suggestions I can try any suggestions would be very helpful. As am beginning to think I need to give up on using 2 external monitors on my Mac now.....

Thanks very much