The Clang Format component of the Beautifier plugin doesn't properly format the file when "Use predefined style" is set to "File". In Qt Creator 3.6.1, using the "File" setting, clang-format would find the project's .clang-format file and use the prescribed settings. This functionality is not longer working. Instead clang-format formats the code to an unknown style. The same style is used regardless of the "predefined style" selected in the options.