Sometimes your firewall may block the update server.
Right-click the Nitro icon and select "Run as Administrator" before checking for updates. Patch Nitro Pro 13
Nitro Pro 13 is a popular PDF editing software developed by Nitro Software. It provides users with a comprehensive set of tools to create, edit, and manage PDF documents. With Nitro Pro 13, users can convert PDFs to various formats, including Word, Excel, and PowerPoint, as well as create PDFs from scratch. The software also offers advanced features such as OCR (Optical Character Recognition), electronic signatures, and collaboration tools. Sometimes your firewall may block the update server
If you’re still using Nitro Pro 13 (released 2018-2019), consider upgrading for these reasons: It provides users with a comprehensive set of
: Integrated tools for adding comments, annotations, and electronic signatures directly within the app, including support for Nitro Sign