I've been lurking in the forums for a while and trying out various Magic Lantern modules on first my Canon T3 (1100) and now a 70D. I'm on a Mac, early 2009 Power Mac, with El Capitan.
I had success with Magic Lantern dual-iso, the intervalometer, etc. I shot a wedding, nonprofessionally. I dabbled with dual iso, ETTR with custom white balance and HDR movies, and I have processed several thousand photos with some degree of success last summer.

Then, I upgraded to Lightroom 6 CS from 5, and all of the sudden my Lightroom photos, that I had previously processed with the current cr2hdr, when opened in Lightroom were drastically lighter with the highlights blown out and unrecoverable.

The image preview would open looking fine as I had already processed and adjusted all the photos, then the preview would go too bright. I stewed on that for a while, then moved on.
Then I upgraded to El Capitan and nothing in post-processing Magic Lantern files would work. There was also that thing about Adobe Camera Raw not recognizing my 70D files.

I finally figured out about the SIP, and got my bin files in order.
I've recently have been trying to use the Magic Lantern Lightroom plugin, which seemed to work best in my workflow. I'm using the 3.0-BETA4 plugin. It works great, fast, no errors but my dual iso photos get processed too bright again!

Is it my dual iso settings on my camera? I shoot without dual iso and the exposure is good (iso 1000) I shift into dual iso (iso 1000-4000) and they are overexposed. I thought the ML dual-iso would determine which iso value was best for an area of exposure.
I've been playing with the MLP Services and with troubleshooting I get files that look like close to what I think is possible but I'm not proficient at getting the correct setting. Is there some way to adjust the ML Lightroom plugin brightness setting before processing to get proper exposure? I have the original CR2 files from that wedding, etc., am I going to get back the dual iso photos that once worked and now are over exposed when processed?
I like to shoot bands in clubs under low intensity, colored, stage lights with action, so a high dynamic range on dual-iso a single shot would be great. I'd also like to use Magic Lantern techniques for video at some point again.
I know you probably want sample files, logs file and other information. I also understand you may want me to move to another more appropriate forum. At this point, I'll accept whatever advice I can get. And I'll try to provide any information you fine individuals would desire in order to provide a solution, or directions to a path.
All of you guys; @A1ex, @dmilligan, @nikfreak, @audionut, @walter_schulz, @danne, @kichetof, @DeafEyeJedi, @g3gg0, etc. deserve a huge wave of appreciation for what you are doing. My photo friends can not believe what you've allowed my lowly equipment to do. And showing Canon what their products should be able to do. (Canon:I really want HDMI output while recording video with headphone output with strong wireless connectivity on my next camera.)
Best regards,
David Johnson