I have downloaded the file for linux (ubuntu) and I'm not sure what to do next. I have no idea what format .sh is or how to use it. When I simply click on the downloaded file the computer tries opening it in a text editor, but fails, and writes the message "gedit has not been able to detect the character encoding. Please check that you are not trying to open a binary file. Select a character encoding from the menu and try again." I have tried choosing both of the "character encodings" from the menu but none of them work. What do I need to do to get the program up and running?