The first question I have, because this is something that some new members DO miss, is whether you've actually added the clothing to your Wardrobe? If you have, and it's simply that the clothing editor on the wardrobe itself won't load, then it seems likely it's a browser/computer incompatibility issue (especially since I literally JUST updated my HA with a few minor changes). Subeta works best for me on Google Chrome or Mozilla Firefox, and it has infamously bad blood with Internet Explorer. Like every other site in the history of man. If you're on IE, try one of those two browsers and see if that helps.
If it's neither of those two things, then probably some more information will be needed for more suggestions...