No problem. The same sentence is now also repeated in the initial section of the page. Click the blue link below which will take you to my page: Contents - Toroidal Ferrite Core Inductor Calculator (google.com) or copy this web address to your internet browser: https://sites.google.com/view/sp3l-...ous/toroidal-ferrite-core-inductor-calculator and go to the page. When on this page, locate the sentence: "Click here to download the calculator and its help file. Current version: x.x" and click the word "here". Visit the page from time to time to see if you have the latest version. The current version is 1.2.