So I am following some steps to try and launch this Jar file. I am a Linux Mint 19 user of only a week or so, I used it once before but briefly.
$ chmod +x launch.sh
I am trying to launch this program from Terminal in that folder but nothing seemed to happen. I followed these steps previously: How do I make a Java JAR file executable in Linux Mint? [duplicate].
It gives me an option to open it with Java SDK 11 Runtime from the right click menu in Nemo.