wc3 viewer problem

[LvTM_Cracker]

Hello guys,
I lost my old wc3 viewer, so i downloaded new one. All works fine, but when I am exporting an .blp image to any format(.tga for example), its background is BLACK. I remember when i was using old wc3 viewer, the background was transparent, but now it is totally black. As a result, I have problems working with these images. The question is, how can i change the background color to transparent of exported images(in wc3 viewer, not photoshop & etc.)?

 

[Fire_Onyx]

Here is my wc3viewer and it's working,you may need Winrar to extract the files:

http://www.filefactory.com/file/ffa361/

 

[LvTM_Cracker]

Thank you, but still, extracted images have black background. Are your extracted images black too? Or are they transparent?

 

[Kimbo]

images must have an alpha channel

and they must be in the dimensions of 64x64

 

[Fire_Onyx]

Thank you, but still, extracted images have black background. Are your extracted images black too? Or are they transparent?

no,they are images