If the software does not start, then I recommend a full reinstallation, but before doing that, remove the current version and download the latest one from the official website. Keep the setup on your desktop, then run CCLeaner and completely remove the registry items using the Registry module. Reboot the PC, download the application again and install it, then it should work. I have tried this way when Bluestacks was showing issues and problems when every time I tried to launch it.
Download Bluestacks: http://www.bluestacks.com/