The Harmony client is the new Adobe Flash based graphics client that will eventually replace the HTML interface to the EZSrve. It is beta level at present but very far along. You can use the Harmony client by entering the URL http://www.compacta.org into your browser. The client is transferred over the net so it takes a bit for the initial login screen to come up completely.
You can upload an empty Actions.xml file which has the effect of erasing the current Actions.xml file.
What EZsrve image level are you running?
EDIT: There is a forum category, Harmony GUI just below the EZSrve category. The Harmony GUI document is available as a link off the first topic as well as additional information in the next topic.