There's nothing to use on those charm items.
Those items are only able to add to your stats. Look at your stats, and equip those items and remove them and you will see that you stats will go up/down as they are equiped and removed.
so I believe those (after reading your "old" thread on forums, are working as attended. They dont' have a "use" feature. and that is why you don't see the drop down menu.
Now with that being said, you should still have the options "slot 1" and "slot 2".
try updating with the darqUI utility. you might have an old file.
__________________
|