This is a Blender 2.8 file. This is the most important file used when exporting to a final glTF or glb. It is the base (default) robot avatar used by Hubs and can be useful to dissect how Hubs avatars ...
When exporting a modified VRM avatar/model Blender freezes and goes to crash but then recovers and saves the files however it seems during the few moments that Blender is freezing during export it's ...