Okay, I'm back, and with a new version.
I believe the last problem was due to me taking some shortcuts with the layer groups that work with files saved by CS* but not CC. It should be fixed.
I also improved the support for the layer masks.
That being said, the adjustment layers are currently not supported. I would like to support some of them (probably levels, curves, gradient map, brightness/contrast, hue/saturation & color balance) but they're very tricky and the documentation is... not great. So it will take time, at the very least.
Sorry 'bout that, re-implementing Photoshop's renderer is no easy task, and it will take some times before everything turns out perfectly ^^'