Here are some places where you can look for information about Vaa3D and Vaa3D-Neuron:

Homepage
Vaa3D and Vaa3D-Neuron has a homepage that can be found at http://www.vaa3d.org
Forums
  1. open-discussion: General Discussion
  2. help: Question / Help
Trackers
  1. Bugs: Bug Tracking System
  2. Support: Tech Support Tracking System
  3. Patches: Patch Tracking System
  4. Feature Requests: Feature Request Tracking System