First close the game if it’s running, then create a file named (code on first line), in the same folder where the game’s executable file is located (Innocent Witches.exe), any extension will do, for example .txt. After that a new option will appear in "extra" -> "extra", which will allow you to unlock the memories. Additionally, when starting some of the chapters via the New Game menu, you will get an option to start it with lots of gold and high stats