Originally posted by REBUGFirmware
As the title says im a bit confused on this.
Any help is appreciated

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You can if you've changed your kernal type to DEX. However there is no point

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They are both exactly the same but if you converted to DEX, when the next update comes out you would use the D-REX edition.
D-REX just supports updating on the DEX kernal.
REX supports updating on the CEX kernal.