Well, sorry for not being of much more help.
I'm really out of ideas.
One last thing that comes to mind. I did use Lemur in Win7 and you say you're using Win10 so, maybe something new to 10 that's causing some problem.
A service, something different with the firewall, or something? Perhaps try a mates PC to see if it works.
Or try TouchOSC. I got that one right here, and it's working alright for me.