I don't know, why Ctrl+Shift+F9 does not work, it works for me if gcc is my default compiler, but if I make VC++2005/2008 to my default compiler, nothing happens (except for clearing th elog window), but I do not have any MS-compiler installed.
To copy settings from the backed up default.conf to the newly created one, you should use cb_share_config.exe, which resides in C::B's executable folder.