You don't open it in win rar.
Right click the file, click open with, use Java.
Alternatively, right click it, go to properties, select always open with, then Java.
I somewhat agree to an extent, his script suit's mains basically. It would be nice if it could be more pure friendly, or have a different alternative route/areas/methods of getting to places for pures.
But alas, it is still a great script!