Why isnt fortnight downlaoding?

Every time I try to download it tells me I already have the epic games launcher installed and that I will have to uninstall that version to install a new one, but the only problem with that is that I have deleted any file doing with fortnight/the launcher so I don’t think I should be having this problem. Did I do something incorrect is their a a specific way I have to uninstall it and re install it?