Ultimate Facebook wont Install

I have Ultimate Facebook on other sites and it has installed just fine before, but recently i cant get it to install, it gives me an error. The site mention above, HWAOnline.com i have tried to add it to it but keeps giving me an error when i go to install it. Below is the exact wording it says "Downloading install package from https://premium.wpmudev.org/wdp-un.php?action=install&key=91a2b00a85dd8f4292ea5ae69b328b686b33faf3&pid=228…

Unpacking the package…

Installing the plugin…

Destination folder already exists. /home/content/63/9742363/html/hwa/wp-content/plugins/wpmu-dev-facebook/

Plugin install failed"

But i have even verified on my hosting and all that it does not exist, but somehow is registering that it does.