Thanks Martyn.
I'm on 6.8.6.9 now. Colour print restored and it has also fixed the problem of the serial decoding line being misplaced on print , which was my original reason for updating.
Peter

Just updated to 6.7.40.3 and now lost colour on print preview and print. Tried the beta 6.8.3 link above (23 Dec 2013)
but it says no beta versions are available. How can I fix my colour print problem?