Unfortunately, changing resolution will not help you, because you can't change aspect ratio of pixels on your monitor.
If you have LightConverse 301 distributive - it's the last version.
Please don't afraid "egg looking" circles of GUI. This is normal when Wide-Screen GUI runed on 4:3 monitor (in old versions was 4:3 GUI).
On Visualizer 3D window all objects are shown in correct aspect ratio, don't worry.

=_hmm...