[User feedback required] Unexpected Error during JDownloader Startup

Hi,

I tried to start Jdownloader today, but I always get an Error with the updater:

org.jdownloader.update.launcher.JDLauncherFailedException: java.lang.NoClassDefFoundError: jd/gui/swing/laf/LookAndFeelController
	at org.jdownloader.update.launcher.SecondLevelLauncher.launchJDownloader(SecondLevelLauncher.java:601)
	at org.jdownloader.update.launcher.SecondLevelLauncher.init(SecondLevelLauncher.java:464)
	at org.jdownloader.update.launcher.SecondLevelLauncher.runMain(SecondLevelLauncher.java:267)
	at org.jdownloader.update.launcher.JDLauncher.main(JDLauncher.java:19)
	at jd.Main.main(Main.java:8)
	at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
	at sun.reflect.NativeMethodAccessorImpl.invoke(Unknown Source)
	at sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source)
	at java.lang.reflect.Method.invoke(Unknown Source)
	at com.exe4j.runtime.LauncherEngine.launch(Unknown Source)
	at com.exe4j.runtime.WinLauncher.main(Unknown Source)
	at com.install4j.runtime.launcher.WinLauncher.main(Unknown Source)
Caused by: java.lang.NoClassDefFoundError: jd/gui/swing/laf/LookAndFeelController
	at org.jdownloader.startup.Main.<clinit>(Main.java:68)
	at org.jdownloader.update.launcher.SecondLevelLauncher.launchJDownloader(SecondLevelLauncher.java:582)
	... 11 more
Caused by: java.lang.ClassNotFoundException: jd.gui.swing.laf.LookAndFeelController
	at java.net.URLClassLoader$1.run(Unknown Source)
	at java.net.URLClassLoader$1.run(Unknown Source)
	at java.security.AccessController.doPrivileged(Native Method)
	at java.net.URLClassLoader.findClass(Unknown Source)
	at java.lang.ClassLoader.loadClass(Unknown Source)
	at sun.misc.Launcher$AppClassLoader.loadClass(Unknown Source)
	at java.lang.ClassLoader.loadClass(Unknown Source)
	... 13 more

I deinstalled JD 2 and reinstalled it: Then it worked fine until I installed the latest Updates.

Greetings Tyde

that error sometimes occurs to me, while using a proxy (ultrasurf) ... not your case? use some kind of proxy? ...

[coalado]

How did you install JD2? Which Installer Did you use?