Download update and required files:
http://rapidshare.com/files/115359188/threeeightzero_M33_FL.rar 

To install, put the UPDATE folder into: 

P:/PSP/GAME/

where P is your PSP drive/memory stick. Then run the 3.80 installer on the PSP.

For later updates from M33, just use the network update feature in the PSP now!! That includes the M33-4 that was recently released. So I will not need to upload those.

There is a 1.50 kernel patch released recently. I will upload that soon since it is an optional feature and cannot be updated from the network update.

To update to 3.80, the PSP firmware must be 3.52 M33-3 or higher. For Slim, the PSP firmware must be at least 3.60 M33 or higher to update. Be sure to set the homebrew kernel to 3.52 in order to use the update.