After payment, you will received a serial number(s) via your email. Download Nitro from Official website: Nitro PDF Pro 14 Version Nitro PDF Pro 13 Version Operating System: Windows, Mac is not available. When installing, select the language. Activation steps: 1. Click Activate Now/Advanced/Manual 2. Paste your key. Then Click [Next] 3. The most important step!!! Click [Copy] and paste all the code and send … Continue reading Nitro PDF Pro 14 Activation Steps