In Google Chrome
Click on the download to open the installer from the downloads bar at the bottom of the window:
In Microsoft Edge or Internet Explorer
Click "Run" of the options that appear at the bottom center of the window:
In Mozilla Firefox
Choose "Save File" in the dialog that appears:
Go through the CET Setup wizard step-by-step.
Once the installation is complete, you log in to the program with your MyConfigura ID, as usual.