Settings
Settings in this package can be found in Project Settings window tab called Agents Navigation. The first field references project wide settings asset that stores serialized fields of the settings.

To change settings you will need to create scriptable object Agents Navigation Settings
. It can be done using menu item Assets>Create>AI>Agents Navigation Settings
and then referenced to the field.

Note
Then setting asset is referenced it will be automatically stored in player settings preloaded assets. In case no asset is referenced the default settings will be used.