So I am a totaly noob when it comes to this stuff and I accidently installed CFW 6.38 on my PSP Slim over my CFW 5.50. I have tried Hellcats Recovery tool and various other methods to restore my CFW but when I try to run it or any patcher for that matter I get the "this game cannot be started. The data is corrupted".

Would someone be so kind as to point me inthe right direction to get this fixed.

Thank you for your help!