Changing splash screen on windows trial lisence

I have pro trial license and I want to change the splash screen on the game’s start-up. I did it via player settings/ splash image ( config dialog banner), and nothing seems to change. Any ideas why ?

According to this conversation it looks like you really need the real pro license to use your own splash screen.

And also, according to this it’s in any case against Unity’s terms to publish games made with trial license.