The additional pull down menus I select in the CUI dialog box are gone after I close C3d (or LDD for that matter). When I open the program back up and go into the CUI the menus are still selected but not present. I have to un-check them, apply changes, then recheck them and close to get them to come back. I have this problem with the new Corridor EZY menu in C3d and with pipes, hydrology, etc. in LDD. I usually simply modify the standard C3d complete workspace but I have had the same problem if I make a new custom work space. It is as though only a certain number of menus can be added.