It would be nice if it did not cost $5+ just to download and try-out. Is it scheme / python / compiled ? Guessing not compiled.
There are alternatives:
A simple renaming script-fu plugin https://script-fu.github.io/artbox/hub/p...me-Layers/ and https://script-fu.github.io/funky/hub/pl...me-Layers/
or
More comprehensive, the Batcher python plugin. https://kamilburda.github.io/batcher/
Comes with documentation on renaming: https://kamilburda.github.io/batcher/docs/renaming/
There are alternatives:
A simple renaming script-fu plugin https://script-fu.github.io/artbox/hub/p...me-Layers/ and https://script-fu.github.io/funky/hub/pl...me-Layers/
or
More comprehensive, the Batcher python plugin. https://kamilburda.github.io/batcher/
Comes with documentation on renaming: https://kamilburda.github.io/batcher/docs/renaming/