This is with Editra 0.7.20 running on Windows 7.
The codebrowser window does not list class methods.
In the attached screenshot, you can see three methods in the edit window: The class method create_with_codes and the instance methods set_codes_from and brbm. The code browser window to the right lists only the instance methods.
BTW, on the screenshot you can also see that the filenames on the tabs of are hard to read. It would be great if we could configure manually the colours of the tab (foreground and background).