Noob - How To Rename Batch of files in a specific manner

There are two solutions that enable batch renaming of selected Finder files:

  • Batch Rename Files in the Finder, which you can also find in your Keyboard Maestro Macro Library

  • Either of the two revisions of that macro at the end of Rename Files Mystery (although the Perl version has worked better than the JavaScript version for me). These enable regular expressions (which you don't need in this case).