After first uninstalling Java 13 JDK (which is the latest Java atm.) and installing Java 1.8 JDK, I had to reinstall Eclipse.
After that I copy pasted, deleted the project and remade it. Exported and it was there.
So I created a script, exported it as a .jar to the scripts folder but it's not showing up in the script selector. I've deleted the folder and restarted OSBot several times, then exported the script again. Other scripts, ones from the SDN, are there. How can I make this local script appear?