Hi all! i really didn’t discover what/how the config stopped working, but just fixed following the instructions beneath from the link [http://unix.stackexchange.com/questions/9973/configuring-mouse-for-rightleft-button-simulating-middle-click-for-copy-paste#9992](link url)
The third mouse button can be enabled system wide by adding a file /etc/X11/xorg.conf.d/20-3rdbutton.conf with the following content:
Identifier “middle button”
Option “MiddleEmulation” “on”
It seems that the problem only happened to me, that’s weird that even downgrading ALL the packages to a day before the issue didn’t solved the problem,…
But now everything is fine, and if someone else have the problem can fix following the instructions on the link.