strSuffixLower(filename, ".mpx"));
boolean demo_available = is_single_level_file;
boolean is_mpx_file = strSuffixLower(filename, ".mpx");
strSuffixLower(filename, ".mpx"));
boolean demo_available = is_single_level_file;
boolean is_mpx_file = strSuffixLower(filename, ".mpx");