I edited my blueprint file outside BookyAI. How do I load it again?

From version 1.9.21, once a blueprint is in the New Book form, two buttons sit next to it: "Save .json" and "Load from a file". "Save .json" saves the blueprint with the voice exactly as the form has it now, including any narration, heat level or style you changed by hand. Edit that file wherever you like, then press "Load from a file" and choose it: everything in the file replaces what the form has, the topic included. The first time you load a blueprint, a topic you already typed is kept; a second load replaces it, because you are loading your edited plan.