Changing the hero icon.

Yes, I've already fixed it, but now there's a new problem: when I save, the transparent background (empty spaces) turns white. I've tried all the formats. Could you please provide more details about where the format is specified in the xdb file?*
TF_8888 - is this the line? I just couldn't find the TF-8888 format.

Good day. The white background is related to the fact that you either don't have an alpha channel or it's not configured.

In the Channels section, add a new channel and paint white the areas that should be visible, and black the areas that should be transparent, then save. Then everything will work correctly!

Here is the result of the screenshots above: