Today at around 12 noon (25/5/2018) I saved my project and went about my daily business. When I logged back in some 12 hours later all the Copper Areas on both sides of the PCB had disappeared, a total of 14 Copper Areas. Somewhat upset, but not deterred, I recalled an earlier version via the Histories Record function and continued with my project. However, after saving and reloading the project I found all 12 of the top Copper Areas had disappeared, but not the bottom 2 I believe we had an update today and this may well be the problem? Frendor.