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Freeplay PRXdecrypter issue a new update for the homebrew , originally developed by coder jas0nuk of which are newly available sources , able to extract and decrypt PRX modules present in all official updates , custom firmware , games and even demos . The update today introduces compatibility with files of firmware 5.70 , 6.10 and 6.20 per PSPGo using the keys from the developer recently discovered coyotebean .
To follow the link to download.

Changelog v2.6 :

Quote:

- Decrypts files fw 5.70 , 6.10 , 6.20 PSP Go