Originally Posted by Meldung vom jd.sh script im Terminal

JD Installation found: No valid JDownloader.jar exist!
Cannot start JD-Updater: Download/Start JD-Installer
--11:21:44-- **External links are only visible to Support Staff****External links are only visible to Support Staff**
=> `restore.jar'
Verbindungsaufbau zu 212.117.163.148:80... verbunden.
HTTP Anforderung gesendet, warte auf Antwort... 200 OK
Länge: 43.258 (42K) [application/octet-stream]

100%[====================================>] 43.258 147.03K/s

11:21:45 (146.53 KB/s) - »restore.jar« gespeichert [43258/43258]

Exception in thread "main" java.lang.NoClassDefFoundError: jd.update.Main
at java.lang.Class.initializeClass(libgcj.so.70)
Caused by: java.lang.ClassNotFoundException: com.sun.java.swing.plaf.windows.WindowsLookAndFeel not found in gnu.gcj.runtime.SystemClassLoader{urls=[file:install.jar], parent=gnu.gcj.runtime.ExtensionClassLoader{urls=[], parent=null}}
at java.net.URLClassLoader.findClass(libgcj.so.70)
at gnu.gcj.runtime.SystemClassLoader.findClass(libgcj.so.70)
at java.lang.ClassLoader.loadClass(libgcj.so.70)
at java.lang.ClassLoader.loadClass(libgcj.so.70)
at java.lang.Class.forName(libgcj.so.70)
at java.lang.Class.initializeClass(libgcj.so.70)