Judgemental and judgmental are both correct. Even though it's not acceptable to the grammar of the computer, but it's acceptable by writers, copy readers and proofreader. Also judgemental with letter E is used in the doctrine of the court, as well as the in writing a legal document. So for those anon who are saying that is wrong, I will tell you that it is correct. I am a proofreader. I proofread thesis, case study and I also critic.