I want to uninstall Jdownloader 2 beta, having taken the steps in this webpage: http://ubuntuhandbook.org/index.php/tag/13-04/.
Apparently, it is a sort of installation with ".sh" files. What I have figured out is that the regular "Jdownloader" can be removed writing commands such as:
sudo apt-get purge jdownloader
and so forth. However, I have been trying the same way with "Jdownloader 2 beta" but it does not work out.