improved version; revised edition; refinement
Refers to a version of something that has been improved or revised, such as a product, document, or plan.
An improved version of this software is scheduled for release next month.
Please submit the revised proposal by tomorrow.
新版 means a new edition, often implying a fresh release rather than just an improvement of an existing one.
Compound of 改良 (improvement) + 版 (version/edition).