Solving problems with JDownloader

J Downloader wouldn't start up. After trying all kind of solutions I found this one: enter the following in a terminal:

sudo update-alternatives --config java

This happened then:

sudo update-alternatives --config java
[sudo] password for paul:

There are 3 alternatives which provide `java'.

Selection Alternative
-----------------------------------------------
1 /usr/lib/jvm/java-6-sun/jre/bin/java
2 /usr/bin/gij-4.2
*+ 3 /usr/lib/jvm/java-gcj/jre/bin/java

Press enter to keep the default[*], or type selection number: 1
Using '/usr/lib/jvm/java-6-sun/jre/bin/java' to provide 'java'.

I selcted th right java engine and it workend fine again.



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Using an older version of JDownloader:

"Here is my installation guide:


(1) disable internet access (for example, click the Stop button on your firewall, or open your Network Connections window and disable your internet connection there)--this prevents jDownloader from downloading anything at all from the updateserver when it starts for the first time;

(2) unzip the version 0.4.xxx zip file into an empty directory;

(3) start jDownloader, go to the Configuration tab and select Advanced Configuration, then on the Main tab make sure that "Update only at user request" is checked;

(4) configure any other options that you might wish to change;

(5) exit and restart;

(6) re-enable internet access;

I used this version:
I've rolled back to version 0.4.594. This appears to have fixed the freezes. There are some download links to this version on the following webpage:

http://www.dl4all.net/applications/12379-jdownloader-0-4-594-multilang.html