Better File Rename - Version 2.1 Better File Rename is a shell extension for the Windows Explorer, which allows users to quickly rename multiple files. This powerful, yet easy-to-use utility transforms the often tedious and time-consuming task of renaming multiple files into a simple matter of seconds. Better File Rename is ideally suited for webmasters, users who need to transfer files from UNIX, digital camera owners, as well as for all other users who deal with large numbers of files, such as image collections.