Hi there!
I found your pre-packaged Java 7 executable (at
https://github.com/STIXProject/stix-viz/releases/download/v1.0.5a/StixVizDistro_Windows_java7.zip)
very useful and less buggy than the codes currently available on the site. (for instance, the current codes couldn't really display in the tree view for me; I couldn't drag the nodes in Graph View as freely too).
Would it be possible for you to share the codes you used in the executable / upload them on github?