
Never run or download any files with the EXE extension. Make sure that the file you download either is an ISO file, or contains one (in the case of ZIP and RAR archive files).

Once you run the application, follow the on-screen instructions.

The downgrader is "signed", and can be launched without having a custom firmware installed. been a while since i messed with PSP but just picked one up today for 5 (a little beat up but still worth it) and got infinity running within about 15 minutes. If you're using a PSPgo, make sure this copied to the internal storage instead. great and simple tutorial - the only part i forgot and i dont think the guide mentions is that you have to boot into CFW first for this to work. If you're downgrading a PSPgo, make sure you download the official firmware appropriate for that device.Ĭopy the official firmware update to PSP/GAME/UPDATE/EBOOT.PBP on your memory stick. If you want to downgrade to 6.20, you will need the 6.20 official update.

You will need the firmware update for version you wish to downgrade to. Copy the PSP folder from the extracted output to your memory stick. Download and extract the latest version from the releases on this github page.
