Originally Posted by slantybard
The instructions appear near the top of the first post in this thread:
To downgrade, I assume that you simply drag a previous .bin file (found in link to ixtab's collection of older versions in the thread linked above) to the root folder of your KPW and update via settings menu.
Edit: I just realized that you linked to the instructions yourself!
i downgrade 5.3.3 to 5.3.1 and jailbreak successfully