I have tried downloading StackableItems on my multiplayer server, and all the files are .class files, not .yml. and i havent been able to edit/get stackableitems to work at all.

any advice?

Are you getting a jar file from the download? If not, I'm assuming you are downloading the github project instead of the jar. Where exactly are you trying to download it from?

I have tried downloading it from both Curse.com and dev.bukkit.org

and yes, when I go to download it, it is a jar file I am getting

So at what point are seeing .class files? Are you trying to extract the jar file for some reason?

Oh, maybe something I should mention. I am extracting the files from the jar download onto my computer.

Don't extract the jar file... It just goes in your plugins folder.

yes I am, I take it thats my problem

Okay, for some reason I thought I needed to extract them. thanks for the help/extremely quick response to this. =D