To go to 3.80m33 you need CFW 3.52m33-4 or higher,which you have.
Read the first part of this link
http://www.pspmod.com/forums/psp-fir...ad-source.html (Sony Official Firmware Download Source)
Tells you how to update your firmware
Updates you can get from this link
Dark-AleX - PSP Developer
Don't forget to copy infor. from your magic stick to your comp. like games,themes,saves and music.
Format your disk in settings after updating.
Once your on 3.80m33 you can update from Network Update just make sure its set up in recovery mode.