My serial number "does not exist"??

[Josiana 0]

My serial number "does not exist"?? 

I cant work !!!!!!!!!!!!!!!!!!

[Leslie V. 0]

Hello @Josiana

Thanks for reaching out to us!

Please uninstall the old version of Nitro Pro and install Nitro Pro 13. You can get the correct version 13 installers from this page: 
https://www.gonitro.com/nps/product-details/downloads

After installation, you can activate by opening Nitro, click on the Help tab > About Nitro Pro > Activate and enter your serial number.

Please let me know how that goes.
 

[Josiana 0]

Hi; 

Thank you very much !

It's ok