I'm not sure I understand what's the problem. When you're on the main map, there's an icon at the left top of the screen, click on it and you advance time. To get to the next day, go to your room and click on your pillow.
I don't know, if you're using saves from 0.3 then it's clear why it isn't working. Only saves from at least 0.4-0.5 are compatible (though I don't recommend using 0.4) If it's a new game, I don't know what went wrong, maybe your antivirus deleted something. No one's reported a similar bug before.
