I, too am having this problem regarding not being able to see servers and UDK.exe not shutting down short of logging off or rebooting. I can resolve the server issues by disabling ESET Smart Security 5’s personal firewall (I have UDK.exe whitelisted in the firewall, I don’t know why it doesn’t work, it worked fine until a couple days ago) but I emailed ESET about that just now and hopefully they will get ahold of y’all as I asked them to to iron out the problem their software has with yours. I’m merely posting in this thread because I’m having identical issues and as such the OP isn’t the only one suffering from this issue. I love your game, and I hope you come out with many more with which to take my money!
Oof, I forgot this part:
I flat out can’t close UDK.exe. I can exit out of it from within the game, I can right click and close it, but it’ll still be there taking up ~500MB (inconsequential compared to 24GB available) of RAM and no amount of ending it’s process in Task Manager is getting the job done. It’s still there.