Brad Janson 0 Report post Posted 15 hours ago Hello, I purchased Nitro 12 back in 2019. Recently my PC Laptop died and was required to be re-formatted. Now I'm trying to recactivate a trial version of 13. I've been to the Activation Portal and "deactivated" the serial number. Now when I used the application an attempt to activate i receive an error message stating the serial number does not exist, evan though it is recognised within the activation portal. Please help. Share this post Link to post Share on other sites
AllainU 0 Report post Posted 57 minutes ago Hello @Brad Janson, Thank you for reaching out to us through our Community Forums! Please be informed that 'The serial number entered does not exist' means the serial number you are trying to activate is for a different version of Nitro Pro. Looks like we need to uninstall the current version of Nitro Pro on your computer and install Nitro Pro 12. We then activate it using your serial number. Kindly follow these steps: 1. Uninstall Nitro Pro from your computer by going to Control Panel > Programs > Programs and Features then reboot the machine. 2. Please clear all your downloads folder or delete all downloaded Nitro installers. This step is important because we noticed that if you are saving all the installers and you download them in the same folder (like the downloads folder), the EXE can pick up any MSI installer in that folder and you may pick-up one of the older builds instead of the newly downloaded package. 3. Download your Nitro Pro 12 using these offline link/s: x32 http://install.nitropdf.com/professional_12163574/en/retail/nitro_pro12_ba_x86.msi x64 http://install.nitropdf.com/professional_12163574/en/retail/nitro_pro12_ba_x64.msi To know if you have 32-bit or 64-bit, please refer to this article:https://support.microsoft.com/en-ph/help/15056/windows-32-64-bit-faq 4. After installation, you can activate by opening Nitro Pro, clicking on the Help tab > About Nitro Pro > Activation and entering your serial number. Thank you for choosing Nitro and I hope this helps. Share this post Link to post Share on other sites