SETUP:
Mac OS Yosemite. Using Plex Media server 0.9.5.4
Roku connected to TV, communicates with computer via private home WiFi router.
I am trying to watch a movie which resides on my hard disk. I can watch it with Plex on the computer screen. I wish to watch it on my TV, using the Roku. This used to work without problems, but after I installed a recent update to the Plex Media Server, every time I start Plex, it asks whether I want to allow incoming network connections. Since I am only using my house WiFi, I answer NO. Then the Roku becomes unable to connect to the computer.
I don't understand why.