After upgrading from 17.04 to 17.10, and consequent switch from Unity to Gnome Shell, all the menus of JDownloader 2 became unclickable.
By "unclickable" I don't mean disabled, but that I cannot click them with the mouse.
The menu opens when I press the mouse button and closes when I release it. So I can keep the menu open by long pressing it but, even when open, the items are not clickable.
This happens with all the menus, like the usual Drop-down main menu or the right click menu.
With the right click menu, it stays open when I right click but I cannot select any entry with the mouse because the focus is on the back.
I am using OpenJDK 1.8:
$ java -version
openjdk version "1.8.0_151"
OpenJDK Runtime Environment (build 1.8.0_151-8u151-b12-0ubuntu0.17.10.2-b12)
OpenJDK 64-Bit Server VM (build 25.151-b12, mixed mode)
The problem was that the bundled JRE is not updated automatically by JDownloader and that was causing the problem.
To fix it you have to either delete/rename the
~/jd2/jre
folder to fallback to the system JRE or reinstall JDownloader completely to get an updated bundled JRE.