I am trying to install a new style on my phpBB3 forum and it's not visible for installing on the ACP.
According to this guide, it should be a simple drag n' drop into the FTP and then the style would be visible on the ACP for the actual installation. Yet, I still only see the already installed Styles (at ACP -> Styles -> Styles). Any ideas on why is this happening or where should I look to?