I have changed the colour of a "wall" and a door within inspector but this is not showing as I do it or when I save. What am I doing wrong? Thanks in advance.
you're doing nothing wrong. this is currently not possible. changing the color like you did only changes the color of the symbol in the hierarchy.
to have objects of different color you can color them in an external program, export from there and import into Augment3d.
Thanks for your help and advice.
A feature to let you change the color of stock items is "on the list" for future development.