Your problem is due to the fact that you likely installed uGet from the Ubuntu Software Center and for some reason the USC refuses to update our app.
You have installed 1.8.2 which was deprecated over a year ago.
We are currently on version 1.10.3 which is the current and officially supported version of uget for Ubuntu 12.04, 12.10 and 13.04 as well as all of the ubuntu derivatives.
Please upgrade your version by going to http://ugetdm.com/downloads
You can install via PPA, DEB or compile from source.