It is odd, even if I have selected Top (in the top-left drop-down menu), when I double click on the contiguous coppers then it automatically opens the properties for the copper on the bottom...
Ok I found that if I completely remove the bottom layer (via ctl-alt-c) then it is possible to double click on the copper and get the top layer one.
Hopefully there is a way of doing it without having to turn of the layer every time?
Have you tried pressing tab? This should cycle through the selection.
That works, thanks so much!