Since yesterday my Greenfoot won't start anymore. I tried to un- and reinstall many times, but it doesn't work. I have got this in my debuglog (standalone version): Greenfoot run started: Sat Feb 04 12:36:46 CET 2017 Greenfoot version: 3.1.0 Java version 1.8.0_111 Virtual machine: Java HotSpot(TM) Client VM 25.111-b14 (Oracle Corporation) Running on: Windows 10 10.0 (x86) Java Home: C:\Users\Julian\Desktop\Greenfoot-windows-310\Greenfoot\jdk\jre ---- Opening project: C:\Users\Julian\Desktop\Greenfoot-windows-310\greenfoot\lib\greenfoot\startupProject 1486208208073: Listening for JDWP connection on address: 127.0.0.1:62617 Connected to debug VM via dt_socket transport... Communication with debug VM fully established. An unexpected exception occurred: java.io.FileNotFoundException: userhome\greenfoot\import-cache.xml (Das System kann die angegebene Datei nicht finden) at java.io.FileInputStream.open0(Native Method) at java.io.FileInputStream.open(FileInputStream.java:195) at java.io.FileInputStream.<init>(FileInputStream.java:138) at nu.xom.Builder.build(Unknown Source) at bluej.utility.ImportScanner.loadCachedImports(ImportScanner.java:472) at bluej.utility.ImportScanner$1.run(ImportScanner.java:242) 1486208212393: Listening for JDWP connection on address: 127.0.0.1:62625 Connected to debug VM via dt_socket transport... Communication with debug VM fully established. 1486208215527: Listening for JDWP connection on address: 127.0.0.1:62632 Connected to debug VM via dt_socket transport... Communication with debug VM fully established. 1486208219324: Listening for JDWP connection on address: 127.0.0.1:62639 Connected to debug VM via dt_socket transport... Communication with debug VM fully established. 1486208223243: Listening for JDWP connection on address: 127.0.0.1:62646 Connected to debug VM via dt_socket transport... Communication with debug VM fully established. 1486208226775: Listening for JDWP connection on address: 127.0.0.1:62653 Connected to debug VM via dt_socket transport... Communication with debug VM fully established. 1486208229928: Listening for JDWP connection on address: 127.0.0.1:62661 Connected to debug VM via dt_socket transport... Communication with debug VM fully established. 1486208232823: Listening for JDWP connection on address: 127.0.0.1:62668 Connected to debug VM via dt_socket transport... Communication with debug VM fully established. What's the problem?