Okay I just found a solution there. Delete C:\Users\Voukos\Documents\My Games\Ironclad Games COMPLETELY. Then run the game and it will show you the available resolutions. It worked for me at least...I do not know about the frame rate though...I saw only 60Hz and nothing about 75Hz.
Edit 1: I tried changing the Refresh rate via the settings folder (tried to make it 75Hz) and when I launched the game the previous lovely situation appeared (only 1 resolution available). When I changed the refresh rate to 60Hz, I could see again all the resolutions. So I pressume it has to do with the relation between refresh rates and resolutions. Pretty dumb if you ask me.