The text at the bottom of the homepage will let you know if a more recent firmware is available.

Click the “download firmware" button and choose a location to save the file.

Return to the module pages and choose “Configuration” then select “Flash Update”. 

Within that section click “choose file” and browse to the saved file. Click on “upgrade” and wait whilst the upgrade is performed.

Note that your switch need to be connected to your local network as per the “advanced section”.