I've been using Networx for about a year, licensed for 5 computers to me.
I love the product, but have an issue with UPNP2 support. In my Ubiquiti EdgeRouter Lite, I have UPNP2 in use, as I explain here and I have my Monitored interfaces set to my "Router ERLite-3" and it works great, for a while.
After a few hours since the last time my router was rebooted, I find that Networx stops showing any download activity in my Windows Taskbar, with upload showing just fine. I schedule a chron job to reboot my router at 4am every day, but that's not an ideal workaround.
I realize this is more of a ubnt/Ubiquiti Vyatta question, but I haven't gotten any answers there, but I'm just curious if you ran into any users who have reported a fix for this. I'll be asking this on the Ubiquiti forums too, not a lot about Networx there currently, just 3 hits.