XDJ-RX2 is not working with Rekordbox in Link export mode

My new XDJ-RX2 is not working with Rekordbox in Link export mode, I think I've tried all the obvious solutions so was looking for any suggestions of how I can trouble shoot the issue.

I am running rekordbox 6.1.1 on an iMac with OS high sierra 10.13.6

I have downloaded the link export driver and the USB 10/100 LAN shows in my networks within my system preferences. I have firewall turned off. Screen grabs showing this below.

The firmware on the XDJ is 1.38, I have latest audio driver downloaded 1.1.0. The XDJ works with Rekordbox in performance mode, but when I press the “rekordbox” button on the XDJ the “link” button doesn’t appear in the bottom left on the rekordbox software.

Any suggestions on how I can trouble shoot what is causing this problem would be great