Letting me know will help me provide the exact steps you need.
A text file ( Readme.txt or Changelog.txt ) outlining changes in version 1.18. Common Changelog/Patch Notes (v1.18) If this is an official update, it often includes: File: NEKOPARA1.18.zip ...
did you obtain this specific file (e.g., a specific official patch site, Steam, a community forum)? Letting me know will help me provide the
Refinements to the English, Chinese, or other language, scripts. a specific official patch site
Nekopara_v1.18.exe (or similar file to update the base game).