I have this router as well running 1.9
Was easy to setup. My first try was the console I think I had 1.6, the newest at the time. When I put it in use at my house I uploaded to 1.9 and just used the wizard. Pretty damn easy.
@ubnt:~$ show version
Build ID: 4901118
Build on: 08/04/16 11:31
Copyright: 2012-2016 Ubiquiti Networks, Inc.
HW model: EdgeRouter Lite 3-Port