Scroll down to the "Software Licenses" or "Applications" section.
The most reliable way to get a working license is to upgrade to the latest version of Nitro PDF Pro , which ensures full support and compatibility with modern operating systems. If you'd like, I can:
This is the most reliable "finder" method for an already-installed copy of Nitro Pro 10. Press , type regedit , and hit Enter.
If you are looking for your lost Nitro Pro 10 serial number, you can retrieve it through several official methods. Please note that Nitro Pro 10 is no longer officially supported, and its activation servers have been shut down. How to Find Your Serial Number Check the Windows Registry Nitro Pro 10 Serial Number Key Finder
A lightweight utility specifically designed to fetch 18-digit and 25-digit software keys from registry hives.
If Nitro Pro 10 is still installed and active on your computer, you can find the serial number in the Windows Registry: Can you "update" Nitro Pro 10? - General Product Use
Finding the serial number from Installation ID Scroll down to the "Software Licenses" or "Applications"
Search for keywords like or "Cleverbridge" (Nitro's official online merchant).
Copy the 14-digit license key and save it in a secure location. Method 3: Use the Nitro Support Portal
Once you successfully recover your Nitro Pro 10 serial number, make sure to back it up in a secure password manager or physical file. Note that Nitro Pro 10 is a legacy product; if you frequently switch to newer operating systems like Windows 11, you may eventually want to consider upgrading to the latest version of Nitro PDF to ensure full technical compatibility and security patches. Press , type regedit , and hit Enter
If your old computer crashed and you cannot deactivate it, go to the Nitro Activation Portal website. Enter your serial number to manually clear the old activation slot so you can reuse it on your new computer.
You can then contact Nitro Support with this Computer ID and your purchase details (name, email, order reference number) to have them retrieve the complete serial number for you.
Navigate to the following path: HKEY_LOCAL_MACHINE\SOFTWARE\Nitro\Pro\10
If Nitro Pro 10 is no longer installed on your machine, your registry will not have the data. Your next best bet is to audit your online purchase history.