HikaShop backend Menu CSS is wrong after update

-- HikaShop version -- : 2.3.4
-- Joomla version -- : 3.3.6
-- PHP version -- : 5
-- Browser(s) name and version -- : IE 9
-- Error-message(debug-mod must be tuned on) -- : No error message

Hello,
To get a clear bakcground of what happened, I am taking a databse from joomla 2.5 and importing into Joomla 3.3.6. I was sucessfully able to do so thanks to the forum! But know when I go into the backend to check on the imported data the menu for HikaShop is all white. I can mouse over and get the menus to show but it may not be a good option for someone who doesn't know to do that. Picture is attached.

The option is gone in version 2.4.0. See attachment.
Where is it?