Vanilla 1.8.9 can be downloaded here: https://s3.amazonaws.com/Minecraft.Download/versions/1.8.9/minecraft_server.1.8.9.jar Instructions for downloading Spigot 1.8.8 can be found here: https://www.hosthorde.com/forums/re...e-latest-craftbukkit-and-spigot-jar-files.88/ Paper 1.8.8 can be downloaded here: https://ci.destroystokyo.com/job/PaperSpigot/443/artifact/paperclip-1.8.8-fix.jar (this is what we recommend using) You can easily switch your server to Paper 1.8.8 simply be selecting "Mod: Paper 1.8.8 (2016-03-29-a)" from the dropdown menu above the "JAR File" field in the control panel. However, if you wish to install a custom JAR file, you can follow our guide here: https://www.hosthorde.com/forums/resources/installing-custom-server-jars.30/