Update v2.1 for Windows
Step 1: Download the update
This may take a few minutes, but when it's finished, you should see FSUpdater.zip in your Downloads folder.
Right-click this file and select Open with<Windows Explorer or just unzip it if you already know how.
Step 2: Extract the Update Files
What you just opened is a bundle containing the update files. Using these bundles makes it easier to download files from the internet.
To access the actual update, click Extract all files.
Step 3: Open FSUpdater.exe
This is the updater program. Double-click it to open.
Step 4: Click Update
This will take a few minutes—please be patient. The circle in the middle will change to a check mark when finished.