when installing scene builder, the file list is:

./COPYRIGHT.html
./README.html
./THIRDPARTYLICENSEREADME.txt
./bin
./bin/scenebuilder.exe
./bin/scenebuilder.properties
./bin/bin
./bin/bin/decora-d3d.dll
./bin/bin/decora-sse.dll
./bin/bin/fxplugins.dll
./bin/bin/glass.dll
./bin/bin/glib-lite.dll
./bin/bin/gstreamer-lite.dll
./bin/bin/javafx-font.dll
./bin/bin/javafx-iio.dll
./bin/bin/jfxmedia.dll
./bin/bin/libxml2.dll
./bin/bin/libxslt.dll
./bin/bin/msvcr100.dll
./bin/bin/prism-d3d.dll
./bin/bin/prism-es2.dll
./bin/bin/prism-sw.dll
./bin/bin/WebPaneJava.dll
./bin/lib
./bin/lib/javafx-beans-dt.jar
./bin/lib/javafx-designtime.jar
./bin/lib/jfxrt.jar
./bin/lib/SceneBuilder.jar


notice the extra /bin/bin - this is inconsistent with any other Java/JavaFX product. It should be just /bin or /lib