Sometimes you will receive a .lic file from your IT department or after purchasing a license from a reseller. Here is how to install it manually.
Nitro provides a specific clean-up tool to reset activation states when certificates fail. Close Nitro Pro completely.
The website will generate a text-based .
Click to wipe the broken certificate cache. nitro pro activation certificate
If you are locked out of your software due to a certificate or connection error, follow these troubleshooting steps in order. 1. Run the Nitro Activation Portal (Manual Activation)
Click next to your old computer name or the current duplicate entry.
: You must deactivate the license from the old machine via Help > Deactivate inside Nitro Pro. If the old machine is broken or inaccessible, visit the online Nitro Activation Portal. Enter your serial number there to manually deactivate old hardware certificates and free up activation slots. Sometimes you will receive a
You are using an evaluation certificate, a student license that expired, or a pirated certificate blocklisted by Nitro.
If you need to audit your software or troubleshoot a machine that refuses to activate, you can find the licensing data hidden within the Windows operating system.
A: This typically happens when you have installed a trial or subscription-based version of Nitro Pro but have a perpetual license. It can also occur with newer versions that rely on account-based activation. To resolve it, uninstall your current version, then download the specific installer for your license type (e.g., Nitro Pro 13 or 14 MSI installer) from the official Nitro download page. Close Nitro Pro completely
If your computer cannot access the internet, you need to request an offline activation certificate.
Troubleshooting Nitro Pro Activation Certificate Issues: A Complete Guide
The expiration date field is present even in perpetual licenses, but is set to 2999-12-31 or similar—a classic "never" value.
Download the latest installer for your specific major version (e.g., if you own a Nitro 13 license, download the latest 13.x build).
Helps IT admins track usage via the Nitro Admin Portal . 🛠️ How to Use It