As of early 2023, the stable build for version 13 was 13.70.2.40 .

Nitro Pro 13 (version 13.70.2.40) is a professional PDF editing software used for creating, editing, and converting PDF documents. While many users search for "cracks" or "keygens" to bypass payment, these methods pose significant security risks and are often ineffective for modern builds. Official Installation and Activation

Users with version 13 licenses can continue using that version but may need to re-install v13 if their system automatically updated to version 14. Risks of Using "Cracked" Software

Cracks often contain malware, ransomware, or spyware designed to compromise your personal data.