It depends on your OS, in linux is '.config/Superpowers/systems/' but on windows or mac have no idea. you could use a folder finder function and look where your OS have a folder called 'Superpowers'
Ok the problem here is that the folder is only there when I run Superpowers for the first time, however when I closed it AND THEN added the contents of the core and game. When I start up superpowers nothing happens, its just the dashboard, I press start nothing happens same with settings