Thank you David, I took cautious shotgun approach. I opened my template file and created a new file using the default AC14 template. I then opened the attribute manager in the template file and imported new file's attributes. When on textures I selected all and <<overwrote. That has got rid of the missing attributes. 😄 What else it has got rid of I don't know 😞 But as it is a new file I guess that doesn't matter too much. In order to find the exact texture in my current project I presume I stand the risk of overwriting things that I might want so I have steered clear of that and am happy to live with the missing attributes box coming up every time I open it. At least new projects will be clean.
Thanks again
James