This is because you’re not launching the application from inside your Mac’s Applications folder. You can ensure this by going into your Mac’s Applications folder and dragging the data file onto the Computer Cuisine Deluxe application, instead of double-clicking. (This ensures you are launching the right version.)
If you have the disk image mounted on the desktop, this is not what you want.
You want to first copy the entire Computer Cuisine Deluxe folder into your Applications folder on your mac. Then launch this.