Yes, we won't be releasing XD support for Dawn until she is released to the public, so Universal Clothing won't work for her until then.

You do need to make sure that XD is updated to the very latest version in order for Universal Clothing to work.  There are updates needed for every figure to make them recognizable by the plugin, so when you run the XD Updater, make sure you also update all figures you have installed as well as the program.