Storyline Update 3

I have just been trying to update my version of Storyline without success...

I don't get the 'New Update' message so I went to the help menu to look at the version i currently have installed, according to Storyline i have "Update 1 : 1208.1316" installed on my machine.

I then tried to use the 'Check for Updates' feature, only i got the message "There are no updates available at this time."

Obviously I know that there are updates.  I am guessing that our local Firewall is causing problems with Storyline checking for updates.

My question is how do I install Update 3, and do I need to install Update 2 first?

Many thanks in advance.

Helen