Hi Peter S,
Sorry to come to this late - I have been putting my loft back together after tidying up some wiring.
Glad to see @steveu has sorted you out.
Yes, as you are already running the latest software all you need to do is add the extra antenna and SDR then login and re-run the config as per my previous post linked by Steve. Just make sure both SDRs are plugged in before you start the config. The config text will lead you through the setup. Don’t get too hung up on the questions re antenna gain, you can ignore them for the moment.
Let us know how you get on or if you have any problems.
Best Regards
Peter R