Launching the Ren'Py executable, which then acts as the emulator for those files.

: While the game was originally an RPG Maker title, the Ren'Py engine it is being ported to is based on Python and is highly specialized for visual novel storytelling. How to Use the Files (General RPGM2RenPy Setup)

Placing the original RPG Maker MV game contents (including the .exe and package.json ) into that folder.