I have the free version of GreenCloud and had always kept the "Greyscale option" button on.
Since the last update this button is now always "off" and I have to remember to manually select greyscale every time I print something.
Is this a fault with my printer or has this default setting been changed?
Greyscale option
The option hasn't been changed. Try to do a reinstall of the latest version:
http://download2.obviousidea.com/greenc ... _setup.exe
http://download2.obviousidea.com/greenc ... _setup.exe