Python, Bool property without Load UI behaviour? I have a bool property. I can save the state of the bool property in the startup file. And it will load in this state when you start Blender.

The problem is when i load a new blend file then this bool gets reset to its default status. Or to the state in which it gots saved to the blend file. 

Both is not wanted behaviour. I want to keep the state in which it was saved in the startup file when i load a new file. It is a setting of my addon. It is a bit cumbersome to turn the checkbox on (or off) every time you load a new blend file.

Is there a way to prevent to load the status of the bool with loading a blend file? But just with the startup file?

Examplescript to test the problem. Run it in the scripting layout, turn on the checkbox in the properties sidebar and load a new blend file to see the problem: 

    import bpy

class MyData(bpy.types.PropertyGroup):
    checkbox_bool = bpy.props.BoolProperty(name="A checkbox", description="Do this or that", default = False) # Our prop

class CheckboxpropPanel(bpy.types.Panel):
    bl_label = "Checkbox prop"
    bl_space_type = 'VIEW_3D'
    bl_region_type = 'UI'

    def draw(self, context):
        layout = self.layout

        scene = context.scene # Our data is in the current scene
        layout.prop(scene.my_addon_data, "checkbox_bool") # Our checkbox

        # Example useage of the bool. 
        if scene.my_addon_data.checkbox_bool:
            layout.label(text="checkbox is on")

        else:
            col = layout.column(align=True)
            col.label(text="checkbox is off")


def register():
    bpy.utils.register_class(CheckboxpropPanel)
    #Our data block
    bpy.utils.register_class(MyData) # Our data block
    bpy.types.Scene.my_addon_data = bpy.props.PointerProperty(type=MyData) # Bind reference of type of our data block to type Scene objects

def unregister():
    del bpy.types.Scene.my_addon_data # Unregister our data block when unregister.
    bpy.utils.unregister_class(MyData) # Our data block
    bpy.utils.unregister_class(CheckboxpropPanel)

if __name__ == "__main__":
    register()
There is an AddonPreferences example here. It even has a bool property.

Access this property and display it anywhere like this (for example Panel's draw method):

def draw(self, context):
    layout = self.layout

    user_preferences = context.user_preferences
    addon_prefs = user_preferences.addons[__name__].preferences

    layout.prop(addon_prefs, "boolean")

    if addon_prefs.boolean:
        layout.label(text="checkbox is on")
    else:
        layout.label(text="checkbox is off")