USB to DVI video adapter no longer works

Has anyone found a way around this problem? Before High Sierra I was able to operate a 3 monitor system at the Church on my mac mini. High Sierra doesn't support the device. Apple support doesn't have a solution. I've installed all the current upgrades. I've contacted Apple support.

One monitor is off the HDMI, one is through and HDMI to SDI adapter, then one through the Newer Tech device (Display Link).

My stage display is the monitor that is not working. Not that that has any bearing on the problem but simply that that is a problem for the people or person on stage.