Just wanted to say I was able to convert using MLVconverter on this fine,. to .dng's and a wav file. /// but also to use XnView to convert the .dng's to dpx.
I converterted the .dng's using XnView to .dpx and it works in Adobe premiere...
Using the free XnView
www.xnview.com/en/xnview worked for dpx and it opens in Adobe Premiere CS6.
Use XnView and select all your .dng's ... right click or hit ctrl+U to do batch processing and go to "options" .. and on DPX/Cineon,... click the checkbox on ((("Write DPX in 10bits/component"))) and click "ok" and "Go" in the window below it.
...and i just checked.. it opens in Adobe Premiere CC too.
I'm a bit new to Magic Lantern and all these formats, but converting in XnView with those options seems to work in Premiere.