When you run Vega Webscanner, you will find a pop up for the update. I am going to tell you how to update yourself instead via the official Hammer System Manager of Bugtraq 2.
Be keep in mind that you are not required to use "sudo".
Download the latest version - 1.0 build 96.
32-bit :
wget http://subgraph.com/downloads/VegaBuild-linux.gtk.x86.zip
64-bit :
wget http://subgraph.com/downloads/VegaBuild-linux.gtk.x86_64.zip
Extract the zip file :
unzip VegaBuild-linux.gtk.x86.zip
or
unzip VegaBuild-linux.gtk.x86_64.zip
Backup the current Vega :
mv /bugtraq/tools/web_audit/web_analisys/vega /bugtraq/tools/web_audit/web_analisys/vega-bak
Copy the extracted directory to the destination :
cp -R vega/ /bugtraq/tools/web_audit/web_analisys/
That's all! See you.