I have been a registered user of File Buddy for a number of years now. Version 10 still works with Mojave, and there is a version 11 in the works, although the developer has been dragging his feet about it.
File Buddy is similar to ABFR and has a lot of great features and functions, some of which ABFR may not have. However, I would seriously consider switching to A Better Finder Rename if -- as other commenters note below -- it incorporated an undo option.
Sometimes we make mistakes, or perhaps change our minds about a naming change. When you are working with dozens, hundreds or even thousands of files, as I do, being able to undo a change on multiple files becomes very important. Developer, please consider implementing undo in ABFR. Thank you.