If you cannot find your receipt, Nitro support can search their records for you.
While newer versions (v12 build 13 and later) encrypt the serial number for security, older versions may still store it locally. Inside Nitro Pro : Go to the About Nitro Pro . If you see a number like 504945XXXXXXXXXXXX , the full key is hidden and you must use Method 1 or 2. Windows Registry (v6 or older) : You can sometimes find it at: HKEY_LOCAL_MACHINE\SOFTWARE\Nitro\Pro\Version Spiceworks Community 4. Other Locations Activating Nitro PDF Pro how to find my nitro pro serial number
: In versions 12 and newer, the number is partially masked (e.g., 504945XXXXXXXXXXXX ) for security. Physical & Legacy Methods If you cannot find your receipt, Nitro support