Hi Michel,
Check the following items in Nebulosity.
1. Go to Edit\Preferences\Capture and select "RAW Acquisition"
2. Go to Edit\Preferences\Processing and select "Manually override colour reconstruction".
3. When you do a "De-Mosaic RAW" on an image (or batch of images), this will ley you manually specify the bayer matrix offset.
Use the values X=1 and Y=1.
This should give you all of the RGB values in the correct places. I think this will only be necessary in the short term when using Nebulosity beta versions, or via the ASCOM driver. I'm hoping Craig will bake these bayer matrix offset values for ZWO ASI colour cameras into the next full release of Nebulosity.
Hope this helps.
Jeff