Arglaar
Nitpicking Bastard
You have .jar files associated with your archive program instead of Java.
Fortunately, this is easy to fix.
Right click on the Jar file and choose the option "Open With". (If you do not see that option, hold down Shift as you right click it.)
Now you should see the option to "Choose default program". Select that and another window will open.
This will list several programs.
Find the Java Platform SE Binary in the list, and then select it.
Turn on the Checkbox for "Always use the selected program to open this kind of file" and then press OK.
The program should now load.
Fortunately, this is easy to fix.
Right click on the Jar file and choose the option "Open With". (If you do not see that option, hold down Shift as you right click it.)
Now you should see the option to "Choose default program". Select that and another window will open.
This will list several programs.
Find the Java Platform SE Binary in the list, and then select it.
Turn on the Checkbox for "Always use the selected program to open this kind of file" and then press OK.
The program should now load.