(adsbygoogle = window.adsbygoogle || []).push({}); Hi

I WANT TO GO PSITA 4.50 DEX.

I'm actually on PSITA 4.50.

There is what i see on rebug toolbox:

Systeme firmware: 4.50
LV2 Kernel: CEX
Target: DEX

I cant access to the rebug toolbox CEX/DEX and Selector Functions cause im not on a REX firmware.
When im trying to install a downgrader like Rogero and Rewbug 3.55.4/REX firmware i got this error:

80029CCA Data corrupted (the .PUP file is grey)
Tried to install the downgrader with recovery and the same result...

I actually dont know what to do.. Anyone can help??

Thanks

Trying it now

EDIT: Thanks bro!! I finaly got it!