Thank you for the replies, I have gone ahead and downloaded it, it is a windows application and not hosted, it looks really good.
It can create a fully fledged website of your collection at a click of a button, so i think the hosted bit is so you can upload and store the html files it generates for you.
I will keep testing, on the front of it, it looks like a really good program.
I don't have a huge collection yet, but i'm working on it! Thanks!