It depends on what's selected under Tools > Options > [url=https://www.mediamonkey.com/wiki/WebHelp:Customizing_MediaMonkey/5.0#Customizing_the_Layout]Layout[/url]. Be default the [url=https://www.mediamonkey.com/wiki/WebHelp:Now_Playing/5.0]Playing[/url] and [url=https://www.mediamonkey.com/wiki/WebHelp:Customizing_MediaMonkey/5.0#Customizing_Preview]Preview[/url] are shown.

The [url=https://www.mediamonkey.com/wiki/WebHelp:Filelisting/5.0]Filelisting[/url] in the middle would show what's selected in the [url=https://www.mediamonkey.com/wiki/WebHelp:Exploring_Tracks/5.0]Media Tree[/url] on the left.

What is the right pane meant to display? It does not show the folders I have selected on the left. And how can they be of much use without showing the full path? I have many folders with names like those shown.