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New to this forum and new to ML.  Made several attempts to install ML on my 50D-1.0.9 and keep getting a red error message at the bottom of the screen to restart my camera.  I assume by restart to power down and back up but I always end up with the same result.  ML install attempts made for most recent version and the previous version.  I'm surely missing something basic but don't know what it is.  Any advice appreciated.