Myriad theme dropdown menu on mouseover

hello i was trying to make my menu to dropdown on mouse hover over but i simply cant as i am not very familiar with coding:/
would somebady be able to help me with my problem?
This is website in question www:makemecoffee.com and as i said i would like that menu on the left to drop down on mouse hover over.
This theme is very complicatetd and for start i dont even know where to look for that part in editor. When i looked on source code of that web page i have found section which is responsible for that menu and if i am not wrong it looks like this

<div id="primary_menu"><div class="jqueryslidemenu"><ul id="menu-tester-1" class=""><li id="menu-item-92" class="dropdown menu-item menu-item-type-custom menu-item-object-custom"><a href="#"><span>15 bar pump</span></a>
<ul class="sub-menu">
	<li id="menu-item-87" class="menu-item menu-item-type-post_type menu-item-object-page"><a href="http://makemecoffee.com/coffeetest1/">c1</a></li>
	<li id="menu-item-88" class="menu-item menu-item-type-post_type menu-item-object-page"><a href="http://makemecoffee.com/coffee-machines/">c2</a></li>
	<li id="menu-item-89" class="menu-item menu-item-type-post_type menu-item-object-page"><a href="http://makemecoffee.com/coffee-machines/test3/">c3</a></li>
</ul>
</li>
<li id="menu-item-90" class="menu-item menu-item-type-post_type menu-item-object-page"><a href="http://makemecoffee.com/coffee-machines/test2/"><span>Delonghi EC 155</span></a></li>
</ul></div><div class="clearboth"></div></div><!-- #primary_menu -->

help plz