I've followed step-by-step articles telling me what to do. I've unzipped the folder, opened my ".minecraft" folder, looked for saves and pasted it in there. And then all they say is that if I run my launcher it should show in my Minecraft single player saved worlds but it never does.
I've checked that it's the same version and I've double checked that it is in the same folder and is unzipped, but still it doesn't show up. What do I do?