[dlessnau]

Problem Solved!

I reinstalled Hoster upgrade, turned on the TV and started Hoster.

I added a song to the playlist, and played it. I again saw two displays. One was the preview window, and now I know the other was the singer display, but it was not on the TV, only in a little window on the laptop.

I then dragged that window all over the place with no result.

Accidently, I double clicked that little window, and low and behold, it vanished and showed up on the TV, and all was fixed.

I guess the answer is "When in doubt, double click".

Thanks for all the help.