If you're running a Mac, there is only one Kies download file available. If you're running a PC, you have the option for Kies or Kies 3. On my Windows 8.1 Surface, I tried with Kies and the phone just wouldn't connect and when I plugged in watch, it required me to download Kies 3 and then both devices connected.
Sent from my Nexus 7 using Tapatalk
Sent from my Nexus 7 using Tapatalk