Triangle away doesn't work on 4.3 jellybean Galaxy S3?

[AC Question]

I want to un-root my phone and I'm using triangle away. I've tried many versions and latest but when I reset the binary counter it's stuck at:

PRODUCT NAME: GT-I9300
CUSTOM BINARY DOWNLOAD: Yes (2 counts)
CURRENT BINARY: Custom
SYSTEM STATUS: Official

Some say Knox is preventing me from doing this but I don't have Knox on my phone and I have checked through the phone using Titanium Backup and Explorer. So do I need to downgrade to 4.1.1 for Triangle away to work or what? Please help, I'm really confused and frustrated...