Thanks Lowlander. I got it..

Check your settings for Default 'Play Now' action and that it is set to a play selected only option: https://www.mediamonkey.com/wiki/WebHel ... k_Settings

The "Playing List" Tree on the right is loading my full library on the next song played after clearing all. This is with build 2299

1. Click on the triple dots and select 'Clear'
2. Select any track, right click, and select 'Play Now'