I've checked your download history. You've had 2 consecutive downloads, the latest release and the one before it. Before that, no download was registered with you logged in. Please note only the last 3 releases log user ID's with downloads.
The way it works is it works on consecutive downloads, you can't go back and 'fill in the gaps' so to speak. You will be awarded the updater badge next time you download Construct 2, let me know if you don't get it!