extern boost::filesystem::path home_directory ();
extern bool running_32_on_64 ();
extern void unprivileged ();
-extern boost::filesystem::path config_path ();
+extern boost::filesystem::path config_path (boost::optional<std::string> version);
extern boost::filesystem::path directory_containing_executable ();
extern boost::filesystem::path fix_long_path (boost::filesystem::path path);
extern bool show_in_file_manager (boost::filesystem::path dir, boost::filesystem::path select);