This theme is meant to start PeaZip GUI with no graphic icons.
Embedded themes does not contain .theme file nor graphic, that is embedded in PeaZip for maximum startup performances.
It is possible to display a custom logo (up to 192 px width, 64 px height) in PeaZip file manager’s toolbar, replacing fm-theme.bmp in theme’s folder with a custom graphic file in BMP format.