I have been having trouble getting URsim working and after installing different versions I realized that the install.sh script has been deleting my ROS-melodic packages (see attached photo) so that ROS has to be reinstalled to work. Is this common? I have installed the URsim on ubuntu 16.04 with ros kinetic with no problems but with ubuntu 18.04 and melodic it seems to have a lot of issues. Is there anyway of avoiding interference with my ROS install while installing URsim?
Jen