1. Download the latest wallet from http://klondikecoin.com/downloads/KlondikeForWindows.zip
2. go to C:\Users\{your username}\AppData\Roaming\Klondikecoin (AppData is a hidden folder - Google it)
3. Backup your wallet.dat
4. SERIOUSLY!! DO STEP 3
5. Delete everything except Wallet.dat
6. Run the new Klondikecoin-qt.exe
7. make the new  klondikecoin.conf from details from first post and copy to the \AppData\Roaming\Klondikecoin