This software is not blessed or endorsed by Saint Ignucius.
Confectioner Engine, which powers Cave Confectioner, is now free and open source software. The engine is licensed GPLv2 instead of GPLv3 because of the additional restrictions GPLv3 imposes.
If you know what you're doing, you can pull the source tree with the following line:
git clone https://rocketgit.com/user/mse/ConfectionerEngine
The game contents in the "data" folder remain proprietary. You can simply copy the data into the Confectioner Engine folder. A way to get the data folder without Steam will be forthcoming, though I cannot release that for free.
Why am I doing this? If people want to mod the game, it's good to own the source code as well. Releasing the code should have no immediate impact on sales either way, but it makes everything more fun since those inclined can see how it works and improve it.