Installing newest 4.82.1 Rebug over 4.81.2 DEX

I am having trouble installing over the previous version. Giving me an error about corrupt PUP file. Do I need to go from DEX to CEX, first? Should I wait for the DEX version of 4.82? Sony reports 4x the stability of this new version, and my system seems to hang quite a bit on 4.81.

Sorry for the noob question. I headed here from REBUG as a link to its official forum.

Thanks in advance for your help!