trying to activate and says serial number is not valid.

[Roger Dunning]

Hi, I am trying to activate Nitro Pro PDF on a new PC. I have deactivated other PC's but when I go to activate the new one it is saying that the serial number is invalid. Please can someone help, i have been round in vircles on this and reaally need to get working on it.

[Reymund Oyong]

Greetings @Roger Dunning

Thank you for reaching out through our Community Forums!

An activation issue will likely occur if the version of the license does not match the version of the application that you would like to activate. 
Please check the version of your serial number using our license portal: https://licenses.gonitro.com/prd/portal

From the license portal, kindly take note of the version (the Nitro PDF Pro application installed on the computer must match this version).

To check which version is installed on the computer, launch Nitro PDF Pro and then navigate to the Help tab > About Nitro Pro. 
If the version does not match the license's version, please uninstall and then install the appropriate Nitro PDF Pro version. 

The Nitro PDF Pro installer (versions 13 and 14) can be located from the link below:
https://www.gonitro.com/product-details/downloads - please download the version that matches your serial number.

Kind regards,