With the latest releases; Maze Creator STD and HOME did not include the ClipArt that is normally bundled with the application. This was an oversite and will be corrected in future releases. For the time being, please download them from the Maze Creator Download Extras page and unzip them into your installation directory. This should create a subfolder "ClipArt" with the BMP and GIF versions of the arrows.
http://www.mazecreator.com/maze_creator_download_extras.php