One-click install not in main domain

Can someone help with this please. I did the install of Joomla through one-click and it stated I couldn’t put it in the root directory of my domain as there were already files there. I used Filezilla and view hidden files but couldn’t find anything so I don’t know what was stopping it (new account and domain so very clean Joomla first thing to go on).

Does anyone know if DreamHost limits the installtion in to the domain main path? If so how do I get it that when someone types they end up at the subfolder I’ve now put Joomla into WITHOUT looking like its a subfolder?

Any help would be great.