You should also be able to access it through right click on the Player.

Thanks Lowlander!!! I never would have found it and I don't remember what I did to mess it up. Now I know how to choose where I want to play my music.

Tools > Options > Player and set it back to Internal Player.

Recently I decided that I would like to be able to "cast" music from MM to my smart tv and sound system via wifi. Somehow, no idea how, I have adjusted some setting in error. Now, when I try to play any song it activates the tv and plays the song. But I can't get it to play on the laptop. When the tv is off I get a message that says it's off and the music will not play on the laptop. As much as I thought I wanted to be able to "cast", I would like to go back to being able to play the songs on the computer. Can anyone provide advise on how to change settings to accomplish this?