The latest version of Circuit Tools can be downloaded from here.
You will be asked to specify where to save the installer; you should select your desktop.
Allow the installer to download.
If you open this ZIP file, and select ‘extract all files’ from the top left corner of the window, you can then save this to your desktop
Now open this ‘unzipped’ folder, and click on the ‘setup.exe’ icon. This will then run through the installer – you will have to click ‘next’ a couple of times and agree to some terms and conditions.
See images below: