These files are not included. You can download them from here:
Mirror 0: http://localhostr.com/file/xvPnx6Y/zepheus_data.zip
Mirror 1: http://www.wupload.com/file/2663337007/zepheus_data.zip
MD5: 3AEC1189700C5911E669FED016FBCCA6

Extract the zip into this folder.