Go to the Silhouette homepage at www.silhouetteamerica.com - you'll see a handy big button in the top right hand corner of the page saying "Update Software".
When you have clicked on this, you'll see the following table. Select the appropriate download link for Silhouette Studio for either Mac or Windows.
The file will start to download and will save to your usual downloads location. It is a 183MB file, which took around three minutes to download on my laptop.
Either select the downloaded file from your browser's toolbar, or navigate to your usual Downloads folder on your computer. The file is called silhouette-studio_v4.0.623.exe and the icon is the recognisable Silhouette logo.
Open the file. The installation wizard will begin, and in three simple clicks your software will start to install!
After approximately four minutes, you'll see the following screen:
And there you have it! Your rather beautiful new launch screen and new user interface will appear straight away!
Enjoy the update, and don't forget to check out the lovely Thelma's guide to her first impressions of the new features!