Can't re-install

[Ginaz]

I stopped playing a few months ago and to clear some space form my hard drive I uninstalled Blade and Soul.  I want to play again but I'm unable to re-install.  When I try and re-install I get a message saying "Another version of this product is installed.  Installation of this version cannot continue.  To configure or remove the existing version of this product, use Add/Remove Programs on the Control Panel. {C3F383C1-D050-4A40-843F-8171A6A02C3A}"  I've already checked add/remove and there is nothing there.  I did a search and there's nothing on my computer that I can find that is Blade and Soul or NCSoft related.  Any help to resolve this would be appreciated.