[Bf-committers] bpy.props: default values not saved

[Сергей]

Hi,

I am a developer of addon that allows export blender models to 'X-Ray' game
engine.
My addon adds some custom properties to blender objects, meshes, bones, etc.
Some of these properties have default values (e.g.:
bpy.props.FloatProperty(name="Mass", default=1)) that are hardcoded in the
addon source code.
In new versions of addon I want to change the default values (e.g.:
bpy.props.FloatProperty(name="Mass", default=10)) and this leads to the
problem.

Problem scenario (using a simplified version of addon (see atachments)):
- user (uses old version of addon) creates an object
- then he goes to the object properties panel, and sees custom property
'Mass' value? which now defaults to 1kg
- user is satisfied with given value and it saves scene into file with name
'1kg-object.blend'
- after some amount of time user updates the plugin (new version uses 10 as
default value)
- after some more amount of time a user opens old file '1kg-object.blend',
but now from this file loaded object with 10kg! weight

Please tell me, is there any way to set property default value so that they
stored in .blend files?