Did you unzip the .rar folder? If you haven't already done so, you'll need Winrar or 7Zip or any unzipping program to unzip the .rar folder. After doing so, you should be able to launch the application normally. If you did already unzip it and the game is just simply not launching after double clicking the application, then I'm not sure what the problem could be if there isn't any sort of error message appearing.