Export texture from UE with alpha?

Hi All,

Maybe i’m new, maybe idk a lot of UE4, but i have a major issue, that i’m trying to export texture from UE4 with Alpha Channel, but seems that the Export with TGA option don’t work.

I also googled a lot but i cannot find anyone with my need, so i would ask if someone know a way.
Mainly my problem is that i need a png with Alpha channel from a .uasset file and to me, seems that export is the only way, but with no alpha!

Thank you very much