Could try saving the the _dyn prop as [whatever it was called for a dynamic clothing item] then remove the 2 files from the scene ... load the new saved _dyn prop and select it. If that doesn't make it to show in the plugin, I hope the script writer can help you.

... did you try any other items, very simple items in case the problem is with the garment. ... sometimes closing D/S and opening it again makes things work again ... there was one prop I was trying to have made that just wouldn't take until after a refresh of the program.