In the next update (I am not sure when I will release it), I will drop the support for 1.9.X. I will do this because it is too difficult for my to make the plugin compatible and test it for 4 Minecraft versions. I also want to be able to add some new features available in 1.10. You will still be able to use the new version on 1.9, although I won’t fix any bugs or problems found.