This guide will show you how to uninstall plugins from your Minecraft server.
1 Login to the Kinetic Panel and stop the server.
2 When you are logged into the panel, head to file manager.
3 Head into the plugins folder, you should see a plugin-name.jar in there. Click the box & select "Delete". (some plugins have a folder, you can delete that if you want)
That is how you uninstall a plugin from your Minecraft server!