Few weeks ago I bought a 5D M III. Today I tried to install Magic Latern, but I failed. The firmware version of my camera is 1.3.3, and there was no ML installation file for this version. Then I visited Cannon's website to download firmware 1.2.3. I tried to install 1.2.3, but my camera said 'Firmware older than Ver. 1.3.0 is on memory card. Delete old file and update using later version.'. One thing I was surprised about is that there is no firmware 1.3.3 on Cannon's webpage. It is very strange that my camera is running 1.3.3 firmware.
I really need to install ML. Do you guys have any idea for me to install ML on 1.3.3 firmware, or to downgrade my firmware to 1.2.3?