Using Melodyne as a plugin for LE5

I have recently brought Melodyne essential and I want to use it as a plug in with Cubase LE 5. I am not computer literate so I have no idea how to go about this. I had previously downloaded the trial version on Melodyne and after I had downloaded it, it just appeared in my Cubase without me having to do anything.

I was wondering if anyone could take me through step by step on how to get my Cubase LE5 to use Melodyne as a plugin.

Thanks in advance!