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So I converted my Rebug 4.21 REX PS3 into DEX and when I did this it updated it to 4.30 for some reason. I have converted back to CEX trying to downgrade and everything but when I put in a firmware to upgrade or downgrade to it says "Update data of version 3.40 or later can be installed on this system." But I'm trying to install 4.30 Rebug REX