License can not be activated

[Mirco Szymanski]

License can not be activated. 

Our company has a total of 12 licenses, some cannot be activated. There is always the error license invalid. what can We do? On the website it says the license is not activated. 

[Mirco Szymanski]

Warum dauert es so lange, bis eine Stelle genehmigt wird? Was ist das für eine Unterstützung? Es ist nicht möglich, über ein Forum zu gehen, in dem eine Antwort 48 Stunden dauert, ist nicht nachhaltig ...

[Reymund Oyong]

Greetings @Mirco Szymanski

Thank you for reaching out through our Community Forums!
I apologize for the delay in response to your post. 

I understand that you are experiencing an issue with activating Nitro PDF Pro. 
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,