At the moment the demonstration webapplication is under heavy development. The available version is in a very early stage, which is by far not feature complete. and does not have a fully functional user interface. However, the application can be found under this URL:
https://dbis-isochrone.uibk.ac.at:8443/isochrone (stable version)
https://dbis-isochrone.uibk.ac.at:8443/testing (unstable version)