I bought the Mac App but I can't find it

I bought the Mac app for Revel, I saw it was charged into my iTunes account, but I cannot find it, where should I look first?

I know that with this app I can edit my pictures, but the only Revel icon I find in my Launchpad, does not do the editing part. So, I guess this is not the one. I don't even know how it looks like Help, please, anyone!

LaNegraFlor