What do you mean by "app?" I think you only need an app like winrar or 7zip to unpack it? Try first of all things to right click "JoestarStruck.exe" in the folder and select "Run as administrator."
Oh!, i did unpack the files and tried to run it as an administrator. I got a folder named joestar struck and i tried to run the joestarstruck.exe thing,but every time i tried it didn't open or work..
