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Old 24.03.2018, 16:50
INoodle42 INoodle42 is offline
Modem User
Join Date: Mar 2018
Posts: 1
Default JDownloader 2 Startup Error

At each startup I'm getting the following error:

java.lang.ClassNotFoundException: org.jdownloader.update.launcher.JDLauncher
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)
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)

Have through similar problems, but unable to find a solution yet. Please help!
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Old 26.03.2018, 13:54
Jiaz's Avatar
Jiaz Jiaz is offline
JD Manager
Join Date: Mar 2009
Location: Germany
Posts: 72,531

Delete file Core.jar and the folders update and tmp
Rename JDownloader.jar.backup or JDownloader.jar.revert back into JDownloader.jar
In case there is no such file, download installer.jdownloader.org/JDownloader.jar
and place it there
start it and JDownloader will fix itself
Lists/Settings/Accounts are not changed by this
JD-Dev & Server-Admin
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