Screen resolution

[Jessluvschoco]

hello there!
So, I had heRO on my PC before ( windows Vista ) and it worked properly, but I had to reformat my PC so I got windows 7 and when I got heRO back installed, I couldn't change the screen resolution and it is too small, I can't see much on it. I went to c//program files//heRO//setup, but when I try and change the size, it stays small. Why is this happening? Can someone help me?
thank you!