I have installed Lemmini I think five times before in my other Laptops and for some reason when I download Lemmini Jar in my latest Laptop, it shows up like and cannot be opened:

Do I need that JRE thing? I don't remember installing that and there's a bunch of them in the list.
That's a Java package. You do need the Java Runtime Environment (JRE) to use it.
You can get the latest version here:
http://www.oracle.com/technetwork/java/javase/downloads/jre7-downloads-1880261.html
Sorry to bring up an oldish thread, but the Lemmini website has been down and I'm unable to download the JAR file. Does anyone have a backup of it?