Are you sure you are in debug mode? It looks like a command prompt window, rather than the normal graphical window you are used to seeing.
I enter debug mode through a 2nd shortcut. Just add the debug argument to the end of the startup line in the properties for the shortcut.
I have not gone through the newer write up about finding offsets, but did just verify that clicking the penguin in the upper left in debug mode does give a properties choice.