Blitz make sure you use the installer. Otherwise the config file does not go into the right %AppData% dir.

Per users on IRC:

add nodes to a new duckduckcoin.conf in the AppData\Roaming\Duckduckcoin folder
look in the folder you unzipped the package from and find DuckDuckCoin.conf
That file needs to go into %appdata%\DuckDuckCoin.
then restart DuckDuckCoin-QT

this is the problem, if you dont have the folder duckduckcoin in AppData...
becuase you didn't install the QT before try to launch it