Removing White/Black Borders

Is there a trick/Quick way of removing White Squares around objects using construct 2?

Example Of What I'm Talkin' About:

<img src="http://www.scirra.com/images/articles/explosionnoadditive.png" border="0" />

Is there a quick way to remove that square around objects while only using construct 2 (no other software such as photoshop or others....)

Graphics with a black border like that are supposed to be used with an additive effect.

Or simply import graphics that already contains transparency (alpha channel).

Check this thread.