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, how can I retrieve it? Module 1 - Data Preparation Is there a way to generate the model's coefficients in Excel? Installer integrity check failed? Can I compute the logarithmic return from a time series without any intermediate calculations?