I'm trying to get my son's laptop to play smoother, and have installed Optifine on his laptop, but it says that it needs to be installed on the server as well. I've used the FTP tool to upload it to the server, where I can see it in the file tree, but how do I install it? I'm on an air plan but will upgrade to Dirt or whatever necessary as soon as I know if it's doable or not. Thanks for the help. I searched for "Optifine" in the forums and didn't see any definitive posts or "hey dummy do this" guides, so sorry if it's a common topic!