Option 1
Simply Download this PB2Launcher-1.deb package and install it (do not select "Open with Software Install", chose "Select File" when prompted instead. In else case Software Install application will show "Failed to install file: not supported" message).
Note:
Ubuntu seem to have issue where it won't be able to install .deb package without Internet access. For this case you can download .deb file and try option 2.
Option 2
This method would work if installation needs to be done on systems without Internet access.
Download .deb file from option 1 and save it somewhere, for example at /home/eric/Desktop/PB2Launcher-1.deb (this path will be used in command below)
Copy and paste following command into your Terminal application:
sudo dpkg -i "/home/eric/Desktop/PB2Launcher-1.deb"
This command will also require you to enter your operating system user password (not related to this website).sudo apt-get purge --auto-remove pb2launcher