Wont activate

[Anthony Little]

I've been using version 12 for some time and i need help being able to activate. i keep getting error 24 and it wont let me do a "manual activation". frustrating i have to keep activating a product that i use all the time and its a pain to reactive it each time.

[Allain Umailin]

Hello @Anthony Little,

Thank you for reaching out to us through our Community Forums and our sincere apologies for this inconvenience.

To further troubleshoot this rare activation issue, please refer to these steps in order to install the latest build for version 12:

1. Clear the content of the directory under C:\users\your_username\Appdata\local\temp. For whatever reason, not all temp files automatically remove themselves and is NOT usually caused by Nitro Pro files. Kindly note Appdata folder is hidden and to unhide it, please refer to this article https://cybertext.wordpress.com/2012/05/29/cant-see-the-appdata-folder/ 

2. Download and run our Clean Up utility to uninstall your Nitro Pro:  http://install.nitropdf.com/professional_12169574/install-cleanup/install-cleanup.zip

NOTE: This clean-up tool will erase any existing signature files within Nitro so please save them to another location before using the clean-up tool in order to keep them. Please see this link for backing up custom stamps/signatures: https://kb.gonitro.com/knowledgebase#/search/stamps/000004307 

3. 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.

4. Download and install Nitro Pro 12.16.9.574 using below offline installers:

x32 http://install.nitropdf.com/professional_12169574/en/retail/nitro_pro12_ba_x86.msi
x64 http://install.nitropdf.com/professional_12169574/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 

5. After installation, you can activate by opening Nitro Pro, clicking on the Help tab > About Nitro Pro > Activate by entering your serial number.

Thank you for choosing Nitro and I hope this helps.

Edited April 20, 2021 by AllainU

[Anthony Little]

I followed the instructions exactly and when i reinstalled and tried to activeate it now says "the serial number does not exist"

[Allain Umailin]

Hello @Anthony Little,

My sincerest apologies for the confusion because I have provided the wrong installer links in my previous post.

To further assist you, I have updated them, however, please first uninstall the version you currently have using our Clean-Up Utility below then reboot your machine:

http://install.nitropdf.com/professional_13381739/install-cleanup/install-cleanup.zip

After rebooting please refer to the new installers links in my previous post to reinstall Nitro Pro 12.

Again, my sincerest apologies for the inconvenience this has caused you.

Thank you very much in advance and I am looking forward to hearing back from you.