I just looked at your account and can see that the serial # is missing for your 1.0 version. DW Tools for Google actually doesn't come by default as part of the extension library because it's free to download from the downloads section of our website. The quickest fix is going to be to go get v2 from our website (free!), which will give you not only the latest version of this extension but also a serial number to use it.
In the meantime, I'll report the issue to the web team.