KDevelop3

Has anyone used KDevelop3? The interface is quite problematic here, when I add a file to the project, even though the file tabs are showing, the interface doesn't show any source code window. When I manage to get that window with the source code to show, I have found no way to attach it permanently to the main window. Anyone having the same problems? Is there any config file I can copy so that I can make the interface look like it was when I had just installed it? Thanks. PS: If you know a good, light C\C++ IDE, with syntax highlighting and 'entry help' (that litlle list with the methods\functions which typically shows up after you type the dot operator); please, give me a clue.