There is a simple solution: copy and rename the “example” files.
Notepad++ is looking for files called “langs.xml” and “stylers.xml” and both are in the programs home directory (with the “exe” file), except, they are named “langs.MODEL.xml” and “stylers.MODEL.xml” respectively.
Simply make copies in the same directory and rename both copies, remove the part that says “-copy” and “.model” from the name so they both are named"langs.xml" and “stylers.xml” and whala! It works!
These “model” versions are meant to be examples, to model the method of use for cutomization and serve as backups in case you bork the files once you edit/customize them, that way you’ll always have the backups handy to fix or start fresh.