Have you tried the Torrent download? And do you have UTorrent? That's what seems to work for some.
You could also try the web setup as well when you select if from the downloads.
As for the markings and items..
Click Me ~! (http://sephalovable.deviantart.com/art/Legendary-Markings-Feral-Heart-Marking-Pack-V4-538589673?ga_submit_new=10%253A1465509748&ga_type=edit&ga_changes=1) & Click Me ~! (http://sephalovable.deviantart.com/art/Legendary-Items-Feral-Heart-Item-Pack-v4-1-528359795?ga_submit_new=10%253A1465509519&ga_type=edit&ga_changes=1)