Hmmb... Are you sure? It opened for me on both my computers.
What version of Blender do you have? It's made on Blender 4, so I'm thinking maybe it'll only open right on 4 and above - maybe it gives you the default project file if it can't open the file?
Direct link in case that helps in some way. . .
https://cervine.online/sqrt/downloads/blender/SQRT%20v0%204%205-public.blend
One thing I know will be a little messed up looking is the shading, since the blender file is by itself and I made the textures a separate download to keep stuff small and organized.
[can anyone else check?]

