The window at bottom screen left will accept characters if you have an active dialog on display so clearly the keyboard is linked to my roku stick.
Roku is so clever about forcing the user to slog through every menu option on the board to get what you want ("manage dvr"). Kind of like what is called "burying the lead" in the news business or at the grocery store where key products get relocated just to send shoppers scurrying around through ALL the products for obvious reasons.
Enabling the kb arrow keys for steering through it all couldn't be that difficult. So it is really much easier to just set roku remote aside and use the pc for all the heavy lifting.