Type cmd in your Windows search bar and open it.
Use the following syntax: RePKG.exe extract "C:\path\to\your\file.scenepkg" scenepkg unpacker free
If you aren't comfortable with command lines, several developers have created "GUI" (Graphical User Interface) versions of RePKG. These allow you to simply drag and drop your .scenepkg file into a window and click "Unpack." How to Unpack ScenePKG Files for Free (Step-by-Step) Type cmd in your Windows search bar and open it