Note: In some newer builds of Nitro (v12 and v13), this key is encrypted or removed for security, but it is typically visible for version 10 users. 3. Use a Third-Party Key Finder Tool
If you cannot navigate the registry yourself, several reputable third-party utilities can scan your system and extract the license key for you. Nitro Pro 10 Serial Number Key Finder
Navigate to the following path: HKEY_LOCAL_MACHINE\SOFTWARE\Nitro\Pro\10 Note: In some newer builds of Nitro (v12