Help to get rid of the way the cutter wants to be

I want to print this cutter and stamp, but I don’t want the cutter to go in between the candles like it’s trying to, as it’ll be too fragile on that part of the cookies/fondant. Is there a way to stop it from doing that?

Yes - edit the image and draw a line closing those open sections. Then they will become part of the inside and the stamp but not the outer cutter.