When updating from the stable 4.0.x series, please bear in
mind that your edits will be preserved during this process, but the new
library and configuration will no longer be usable with 4.0.x.
Just run the installer of the new version. It will recognize the old one and ask, if it should uninstall before continuing. Answer “Yes” and you’re fine. Your settings and edits will be preserved.
Thank you, but I don’t understand well what you mean by ‘can easily be installed without manually rebuilding’. I am just a naive user and I cannot build DT by myself, I can only download an installer and install DT on my Windows 10 computer. If I have done that, how can I add the white balance presets? And if not possible: what are the consequences of not having these presets?
By editing, or replacing the wb_presets.json text file.
You just won’t be able to select e.g. exact “Tungsten”, “Daylight”, or “Shade” etc. WB coefficients that match the ones you could set in the camera and OM System think are right for this camera under particular illumination. You will still be able to manually play w/ the WB coefficients/tint/temperature sliders to your heart’s content in darktable (or use the automatic “as shot” WB that the camera detected and reported), but just won’t be able to “preview” what a particular camera preset would have given you with a single click if you had hypothetically set the camera like that during the shoot.
But we digress - this topic is about dt 4.2.1, not about the OM-1.