Hai - you don't need to - go to https://github.com/kittehcoin/kittehcoin

look for a folder called release.  Click on that mofo

Look for a folder that matches your OS. Click it - click it real good.

Download all files therein, store them in a single folder on your computer. Double-click kittehcoin-qt.exe (I'm going out on a limb and assuming you're on Windows.. if you're not, my apologies)

Post back if you still can't get up and running.