Start the downloads to acquire the actual content.
Find the main installation folder of the game.
If Unlock DLC.zip is a zip file containing files meant to be placed into a game directory: Unlock DLC.zip
Knowing this will help me guide you to the specific files or settings you need to change.
Open the Unlock DLC.dlc file using JDownloader. Start the downloads to acquire the actual content
Scenario 1: A Compressed Archive ( .zip containing game files)
Download and install JDownloader , a Java-based download manager designed to handle container files. overwriting existing files if asked.
Copy the extracted files and paste them into the game directory, overwriting existing files if asked.