Hi, the initial state of the treeview template is actually set by applying the "closed" class to the relevant nodes in the HTML. If you want to leave all nodes expanded, simply removing these lines from template.xslt should do the trick:
<xsl:if test="@breadcrumb=0 or @selected=1">
<xsl:attribute name="class">closed</xsl:attribute>
</xsl:if>
I'd probably recommend removing your client options as well - the "unique" and "collapsed" options don't really fit with a fully expanded tree.