Delete/Disable DLC Euro Truck Simulator 2?

I wish to use the Java Map mod. But, in the description I MUST disable the Vive La France DLC. My question is: can I disable the Vive La France DLC?

Edit: Here is a translation of the website requesting I disable the Vive La France DLC


Solution 1:

Unchecking the "Installed" checkbox either through the game's library or properties (DLC tab - Enabled checkbox) page should do the trick.