Beautifier Clang Format doesn't use predefined style "File"

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.