Go to Release on the right side of the main github page.
Download all the files in the newest release.
MAKE SURE THE EXE IS IN THE SAME FOLDER AS DATA AND SOURCE.
Run executable in this exact file structure.
Select between chests, popups, forms, bonuses, levels, or equipment.
Select the world or form.
Select the chest, fight, or level to replace.
Click replace to replace the selected location with the chosen reward.
Click default to return location to original reward.
Choose which patch type to save too and click save.
Click the help button for details on how each tab works and warnings for replacements.
???