Coincidentally, that's what I first did prior to joining and none popped out. None for "disappeared installed files", "custom files disappeared", "vanished installed files", and even "deleted installed files".
So I downloaded all of the item sets on the first page of the other thread. I placed them in the Downloads section, which makes them appear via launcher. I installed them, and they worked as I played. However, after quitting the game and opening it again, a lot of the items vanished! Only patterns, some items, and two clothes remained intact.