The additional settings are visible only if you click the [> > >] button.

The additional settings has an option to set the horizon altitude. Setting this value above 0 degrees will hide objects from the tour list below that level.

Right clicking the object list will expand or reduce the display… revealing or hiding the controls.

The settings for EQMOD Tour are stored in a file EQTOUR.ini in folder:
C:\Documents and Settings\YourLoginAccountName\Application Data\EQMOD