Activation help needed

[D. Tompkins]

I purchased six licenses through Cleverbridge.  They sent  me an email with an order number and six serial numbers.  None of them valid according to activation page.  i keep getting error 20.  I tried using your help but when i put one of the serial numbers in it says its the wrong format or not a valid number.  This is one of the numbers ******.  There has to be an easier way or a phone number to get help activating something i paid over $700 for.   My phone number for tech help is **********

Edited October 2, 2019 by Leslie V.
Confidential information edited

[Leslie V]

Hello @D. Tompkins

Thanks for reaching out to us! I am happy to assist you.

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 Nitro Pro 13 serial number.

Please let me know how that goes.