Important: In some cases you may want to modify the Avastar character beyond what you can do with the Avastar Shape Sliders:
- Create a tiny or a giant.
- Add extra shape beyond what you can do with sliders.
- Modify the Avastar Meshes into something totally different.
- Join the character parts to have one single mesh body
The reason for this behavior is: Blender does not support editing Meshes which have Shape keys defined. The Avastar Meshes make heavy usage of Shape keys. Hence you get major fail as soon as you touch the meshes.
If you do not know what you are doing here, You have a good chance to break Avastar and create wild results: