Seenivasan just found a bug in the hostname field on the main page. Security is controlled by the setting on the info screen (i) button in the top right corner. You do not need to type http or https in the hostname field. They will have no effect on the protocol used. The application originally would not use SSL, so I gave an error if you typed "https://hostname" in the field. I since have changed it to use SSL, but I forgot to remove that check.
Please just use the hostname (no http:// or https:// prefix) in the hostname field for UCSM. I've already fixed this for the next version.