macOS 10.13 High Sierra - failed to connect

I had a UR44 working fine with Cubase 9.5 on a Mac with High Sierra until I upgraded my drive from HDD to SSD. Transition to the new drive seems to have been successful with everything except the UR44 which will no longer connect. I’ve uninstalled and reinstalled a couple times hoping for a miracle but without success. The light on the UR44 stays solidly lit which I thought indicated a connection but when looking in the the audio/midi listing in the Utilities section the UR44 is included. Cubase opens successfully but without the UR44 connection and through the Cubase menus it’s nowhere to be found as an option.
Anyone have any suggestions??