Were you admitted to other programs when you accepted the offer to attend ISU? If so, I wonder if you could re-contact the program(s) (where you were already accepted) and explain how -- after being immersed in ISU's program this semester -- you realize that the approach of one of these other schools is a better fit for you. If you are to go through the whole application process again, you are going to have to very clear about why ISU's program is not working for you, so as not to appear like you are jumping ship when the going gets tough.