We do not have a download file for the latest version (1.0.5.7), but you can try downloading it from the developer's site
Download version 1.0.5.4b from Mac Informer
Version: 1.0.5.4 β
Date update: Dec 30, 2014
File name: renamerox10_5-4b1_demo.pkg
Size: 15.5 MB