The file is created in Blender 3.0 and can be open in any compatible packages. The archive includes files with extensions .obj, .fbx, .stl, .blender with standard materials.

Usage:

In Blender app: just open .blender project from menu: File -> Open… or just by double-clicking the left mouse button. In other apps: use import menu and choice .obj, .stl or .fbx 3d model.