Hello, Well I've been trying to install optifine to the Agrarian Skies+ modpack, and I'm not sure if I'm doing the installation wrong or if its the modpack itself, but when I try to install it to the Agrarian Skies+ modpack, I'm not able to, and it crashes the modpack. However when I install it to the regular agrarian skies, I'm able to set it up really easy. If someone found a way to install optifine, would you please share the info? This are the steps I take to installing optifine: Open .mineyourmine folder>instances>MyM-FTB-Agrarian_Skies+>minecraft>mods>then I place in optifine.
.jar is a java file ending it stands for a bundle of different .class which was before they got complied .java files ^^ when i'm right it would be nice if @knoxz could correct me if i'm wrong