MarsSeed [1] filed a deletion request for demimove [2]: EOL for 8 years [a], broken. Not useful to keep. There are alternative GUI apps for mass file renaming (e.g. krename).
[a]: https://github.com/gmdfalk/demimove [1] https://aur.archlinux.org/account/MarsSeed/ [2] https://aur.archlinux.org/pkgbase/demimove/
