I purchased the whole package (software & video). I used it for awhile and liked the main format so I used it independently of PhotoShop and Lightroom. When doing a complicated mask, I found that the file size would to about 10 times the original RAW or Jpeg. It would then lock up or freeze. I could not save anymore. There was no save as only export which did not work. I lost all of my changes and had to go back and start all over again. I contacted McPhun and they were back with me in a couple of hours. We exchanged emails probably 8 times. They wanted my console files and original images. I must have spent over 15 hours on one image until I finally gave up. Excellent customer service but the problems still exist. I am now going to try it as an extension in Photoshop.

raw photos vs jpeg In google. This is a good place to start

Same thing happened to me. I did a second full install of Sierra and everything started working. The first install was right after Apple released it. I think the install servers got a bit overwhelmed.