Unfortunately there is no way to only show certain levels with the accordion menu module. It currently is only able to show all of them.
Can I get refund? I registered a member for only this extension. I did read the DOC before buying this module. Then I decide to buy it.
In your DOC page:http://www.shape5.com/documentation/Joomla/Extensions/S5-Accordion-Menu
End and Start Levels - These settings allow you to only show a certain number of menu levels. If you wanted to only show the first two levels you would set the Start to 1 and the End to 2.
Pls refund the money, and I go to find correct menu module.