I also can't find the demo project file. The download page only has these two files:
COZY ISOMETRIC EXTERIOR (Free Version).zip 5.4 MB
COZY ISOMETRIC EXTERIOR v2.0.zip 48 MB
Sorry for the late reply. I think there might be problem with the files. I will recommend you to redownload the v2.0 file. The project file is inside it. The project file is only of version 1.0 but soon I will add the v2.0 files in there.
Yes, after redownloading I found it :) thanks