I have just installed the add-in, but a security warning appears in the toolbar now. Mohamad November 30, 2012 19:57 Follow I have just installed NumXL, I launched MS Excel application, but a security warning appears on Excel toolbar (see below). Related articles I forgot my license key Module 1 - Data Preparation Where do I find Excel Add-ins Manager? Is there a way to generate the model's coefficients in Excel? Installer integrity check failed?