Close all position button on C2

A trading friend told me that if you click in TWS the “Close all positions” button it will close all C2 strategies using IB and C2 will not automatically re-populate all your systems trading there. And in order to re-activate auto trading for all your systems all you have to do re-activate one system. Can anyone confirm that? I have never tried it and if that is true you would not need a separate C2 button to close all positions at least for the systems you trade at IB.