I tried booting up the dialogue maker and all I got was a black screen. No portrait, no dialogue box, no visible options, just the mouse cursor. I'm not sure if I need anything else that pertains to the dialogue creator to make the display show.
Hello! Are your drivers up to date? If they are, Have you tried loading the program with OpenGL rendering? You can find out how to do that here.
Please report back if this helped solve your issue!