Piracy

I am following this guide

But I can't get java working, I downloaded everything but I get the messesge "java checker library could not be found, please check your installation" normal prism launcher has no problem with the java I downloaded. I googled it and someone said they fixed it by uninstalling and reinstalling prism, but I can't even figure out how to uninstall prism. All of this is so confusing. I've been trying for a couple days now and nothing's worked. Please help.

Edit: okay I finally figured it out, you have to move the unzipped prism launcher folder to desktop, then execute the prism launcher