Everytime I try to use installed greenfoot, for example if I want to create a new Project, Open an old one, try to compile ... Exception in thread "AWT-EventQueue-0" java.lang.NullPointerException at sun.awt.shell.Win32ShellFolder2.getFileSystemPath(Win32ShellFolder2.java:571) at sun.awt.shell.Win32ShellFolder2.access$400(Win32ShellFolder2.java:72) at sun.awt.shell.Win32ShellFolder2$2.call(Win32ShellFolder2.java:298) at sun.awt.shell.Win32ShellFolder2$2.call(Win32ShellFolder2.java:296) at java.util.concurrent.FutureTask.run(FutureTask.java:266) at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1142) at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:617) at sun.awt.shell.Win32ShellFolderManager2$ComInvoker$3.run(Win32ShellFolderManager2.java:547) at java.lang.Thread.run(Thread.java:745) So i can not do anything :( I am using Win 7, Greenfoot 3.0.4, Java 1.8.0_112 installed (just both new downloaded and installed) and it doesn't work Debuglogfile: Greenfoot run started: Wed Nov 09 11:54:37 CET 2016 Greenfoot version: 3.0.4 Java version 1.8.0_112 Virtual machine: Java HotSpot(TM) 64-Bit Server VM 25.112-b15 (Oracle Corporation) Running on: Windows 7 6.1 (amd64) Java Home: D:\Programme\Java\jdk1.8.0_112\jre ---- Opening project: D:\Programme\Greenfoot\lib\greenfoot\startupProject 1478688881892: Listening for JDWP connection on address: javadebug Connected to debug VM via dt_shmem transport... Communication with debug VM fully established. I tried the portable Version - and again, it does not work: java.rmi.ConnectException: Connection refused to host: 127.0.0.1; nested exception is: java.net.ConnectException: Connection refused: connect at sun.rmi.transport.tcp.TCPEndpoint.newSocket(TCPEndpoint.java:619) at sun.rmi.transport.tcp.TCPChannel.createConnection(TCPChannel.java:216) at sun.rmi.transport.tcp.TCPChannel.newConnection(TCPChannel.java:202) at sun.rmi.server.UnicastRef.invoke(UnicastRef.java:130) at rmiextension.wrappers.RBlueJImpl_Stub.getOpenProjects(Unknown Source) at rmiextension.BlueJRMIClient.initialise(BlueJRMIClient.java:85) at greenfoot.core.GreenfootLauncherDebugVM$1.run(GreenfootLauncherDebugVM.java:81) Caused by: java.net.ConnectException: Connection refused: connect at java.net.DualStackPlainSocketImpl.connect0(Native Method) at java.net.DualStackPlainSocketImpl.socketConnect(DualStackPlainSocketImpl.java:79) at java.net.AbstractPlainSocketImpl.doConnect(AbstractPlainSocketImpl.java:350) at java.net.AbstractPlainSocketImpl.connectToAddress(AbstractPlainSocketImpl.java:206) at java.net.AbstractPlainSocketImpl.connect(AbstractPlainSocketImpl.java:188) at java.net.PlainSocketImpl.connect(PlainSocketImpl.java:172) at java.net.SocksSocketImpl.connect(SocksSocketImpl.java:392) at java.net.Socket.connect(Socket.java:589) at java.net.Socket.connect(Socket.java:538) at java.net.Socket.<init>(Socket.java:434) at java.net.Socket.<init>(Socket.java:211) at sun.rmi.transport.proxy.RMIDirectSocketFactory.createSocket(RMIDirectSocketFactory.java:40) at sun.rmi.transport.proxy.RMIMasterSocketFactory.createSocket(RMIMasterSocketFactory.java:148) at sun.rmi.transport.tcp.TCPEndpoint.newSocket(TCPEndpoint.java:613) ... 6 more java.rmi.ConnectException: Connection refused to host: 127.0.0.1; nested exception is: java.net.ConnectException: Connection refused: connect at sun.rmi.transport.tcp.TCPEndpoint.newSocket(TCPEndpoint.java:619) at sun.rmi.transport.tcp.TCPChannel.createConnection(TCPChannel.java:216) at sun.rmi.transport.tcp.TCPChannel.newConnection(TCPChannel.java:202) at sun.rmi.server.UnicastRef.invoke(UnicastRef.java:130) at rmiextension.wrappers.RBlueJImpl_Stub.getSystemLibDir(Unknown Source) at greenfoot.core.GreenfootLauncherDebugVM$1.run(GreenfootLauncherDebugVM.java:82) Caused by: java.net.ConnectException: Connection refused: connect at java.net.DualStackPlainSocketImpl.connect0(Native Method) at java.net.DualStackPlainSocketImpl.socketConnect(DualStackPlainSocketImpl.java:79) at java.net.AbstractPlainSocketImpl.doConnect(AbstractPlainSocketImpl.java:350) at java.net.AbstractPlainSocketImpl.connectToAddress(AbstractPlainSocketImpl.java:206) at java.net.AbstractPlainSocketImpl.connect(AbstractPlainSocketImpl.java:188) at java.net.PlainSocketImpl.connect(PlainSocketImpl.java:172) at java.net.SocksSocketImpl.connect(SocksSocketImpl.java:392) at java.net.Socket.connect(Socket.java:589) at java.net.Socket.connect(Socket.java:538) at java.net.Socket.<init>(Socket.java:434) at java.net.Socket.<init>(Socket.java:211) at sun.rmi.transport.proxy.RMIDirectSocketFactory.createSocket(RMIDirectSocketFactory.java:40) at sun.rmi.transport.proxy.RMIMasterSocketFactory.createSocket(RMIMasterSocketFactory.java:148) at sun.rmi.transport.tcp.TCPEndpoint.newSocket(TCPEndpoint.java:613) ... 5 more =============== Any idea how to get at least 1 working? (Both fresh downloaded today, include java)