i can't reproduce this behaviour, all working fine on my system. Please make a upgrade of your system first
delete the symlink before updating your system
$ yySyua
open terminator then
$ exo-open --launch TerminalEmulator
give me the output please
this command call the predefined terminal on xfce. if it not open the good terminal, check the preferred applications in the setting manager.
are you using Intel Haswell and Broadwell?
if it is the case please read this
https://wiki.archlinux.org/index.php/Microcode
but i would be suprised that the problem comes from here
trying to launch the file manager by the right click menu, have you the same problem?