That Old Updater is really old, and we don`t support it anymore. I`m afraid you`ll have to try downloading the full file again. I would recommend googling a Free Download Manager or Download Resumer, or try using Firefox browser (it has good default download manager, as well as lots of download resuming plugins)
And don`t forget to uninstall the OldUpdater installed, as well as to follow these steps:
1.) Go to Add/Remove Programs under Control Panel/Programs, and uninstall the Dawn of Fantasy program.
2.) Go to your user directory (C:\Users\Your User Name Here) with 'Show Hidden Files and Folders' enabled (see here
for details), the folder AppData should appear.
3.) Navigate from your user directory to AppData, and then to Local. For more instruction, see:
4.) There should be a folder named DoFUpdater there, delete it.