My transparent 2d sprite sheets ends up with a white background Unity 5.5

2D
1

Every time i try to import my transparent sprite sheet it always comes out with a white background.

THESE ARE MY SETTINGS:

Imgur

the image is originally transparent:

Imgur

But then comes out with a white background in the ‘Sprite Editor’:

Imgur

Thanks for listening. It would be appreciated if i could get some help on this situation.

2

2 and 3 links are the same. I think, something is wrong with save format. Try to delete background in paint.net (as example) save picture as .png with 32 bit