Ok it turns out I made a dumb typo when replacing the script by a minimized version. I typed a dash in the script tag while the filename has an underscore. Therefore you can simply change scripts-minimized.js into scripts_minimized.js in the templates and it will load the minimized one.
I uploaded a zip with this issue fixed but if you change it manually in your templates there's no need to download this new zipfile.
Sorry for the trouble!