Jessica9 0 Report post Posted January 14, 2020 Hello, I tried to Check Eligibility of my Nitro Pro 11 serial number, but it says "We were unable to validate your serial number. Please ensure you entered it correctly. If you believe you are eligible for an upgrade, please leave a post on our Community Forum and update us with your issue." Please help. Thx, Jessica Share this post Link to post Share on other sites
Leslie V. 0 Report post Posted January 15, 2020 Hello @Jessica9, Thanks for reaching out to us! I have made the necessary changes so you can upgrade from Nitro Pro 11 to 13. Please try your serial number again here: https://www.gonitro.com/support/upgrade Please let us know how that goes. Share this post Link to post Share on other sites
