HTPC Cannot Control/Play Music On A Media Server From Another Computer?

Already have it set up that way plus Alt+F4 for fast quit of Plex HTPC (assigned to a spare button on my Harmony 650 through Flirc).

I only have Plex HTPC running when in use (full screen, not windowed).

As for PFW, I can navigate with the K400+. Maybe it is just the way Windows is set up for me ?

Specifically, on Plex HTPC though, the UI just is not intended for close up use (sitting in front of a laptop/desktop).

Well, that depends what you mean. Are you navigating PFW using the arrow keys to navigate and enter button to select items on the keyboard?

or with the mouse pad built into the keyboard?

Most people don’t have that style of keyboard

Plex HTPC is the wrong app to use for his purpose as has been mentioned. PFW isn’t really the right app either.