Current questions and answers regarding the map editor.

Here's the question.
I'm editing the "City of Wonders" map for Heroes V ToE. In this map, there's a quest to capture an object. After editing (changing the landscape), when I start playing, the game ends after a couple of days, and it says that player X has won. My question is, how do I disable the victory condition of capturing territory and instead make the standard victory condition to defeat all opponents? If possible, please provide screenshots showing how and what to click.