Hello, and thanks for your answer.
2) Only one version of Java is installed on my PC, the last version. However, JavaRa should find the items to uninstall this version ?
In the Registry I find the uninstall key : see attached file java.txt.
More, the problem is also describe in this post : http://singularlabs.com/forums/topic/javara-2-4-windows-7-x64/
3) My OS is Windows 7 / x86 and the full path to JavaRa is : “C:\Program Files\JavaRa”