Themes Can Be Changed
Wondershare UniConverter 13 offers two different themes: Dark and Light, from which you can select your favorite.
To change the theme, go to the right-top corner of the interface and select the menu button, then the Themes button. The Dark and Light selections will be visible.
When you select the Dark option, you'll be presented with a dark interface similar to this.
When you select the Light option, Wondershare UniConverter 13 will switch to a light interface, as shown below.