So, it's been a long time since I so much as even turned on my PSP, but I decided today that I'd like to upgrade to the most recent hacked firmware. While I've found plenty of tutorials, what's not clear to me is whether I can upgrade directly from 3.10 OE-A or if I need to downgrade first.
My PSP is the fat model. It came with 1.50, and I upgraded to 3.10 OE-A quite some time ago. Where do I need to go from here to upgrade to the latest version?