You may toggle visibility of 'LSS Zone' related layers:
'LSS Zone' layer
'LSS Zone Area' layer
'LSS Zone Ceiling' layer
'LSS Zone Walls' layer
'LSS Zone Floor' layer
'LSS Zone Volume' layer
'LSS Zone Openings' layer
'LSS Zone Internal Point' layer
hide all other layers except 'LSS Zone' related ones
Refer to 'Elements of a Zone' chapter in order to learn more about what exactly stored on each layer.
In a new model there are no 'LSS Zone' related layers, so extension suggests to create layers
after clicking on any button of 'Layers Toolbar'.