I was missing the New (Shellnew) commands from my list context menu. I restored the original config from DO 10 which had an empty C:\ProgramData\GPSoftware\Directory Opus\Buttons\Menus directory. I made a change to the list context menu and it created a dop file under the menu subfolder. Are the default menus embedded in the program and dop files only created when customizations are made? The FAQ on advanced backup and restore gives some info, but it may be dated.
Yes.
I'm not 100% sure there but it sounds plausible.
Note that C:\ProgramData would only be your config folder if you're using shared config mode (which isn't the default).
It's usually in /dopusdata, under your user profile.