Is there any way to get rid of the annoying windowed mode? Options doesn't list anything.

There is an ini file in the installation folder, I changed the fullscreen option from 0 to 1 and it streches its resolution to widescreen.

//edit: C:\GOG Games\Dracula 3\config.ini
change

Changing that causes the screen to flicker constantly. That's likely what it was set as the default. Any way to make it full screen and avoid the flickering?

Hmm, no flicker here. Maybe you could force Vsync or something using your display driver?
I have this default on, more frames (~60) than my monitor can display make no sense anyway.

p.s. I also tested some borderless ahk scripts, but this only works in the 3D scenes. The menus and everything is fixed size (1024x768). This looks absolute horrible :)
http://www.autohotkey.com/board/topic/78903-yabt-yet-another-borderless-window-toggle/

I also have some games that flicker, if run as administrator (set for nearly all older games by GOG).