Hi,
HikaShop doesn't need any plugin for the structured data as it already has it by default on the views of the product page if you use a recent version of HikaShop. I see however that you use version 2.6.3, and not the 3.1.1 as you mentioned, and in that case, you might need to activatethe hikashop microdata plugin to add HikaShop structured data to the product pages (although I would rather recommand updating HikaShop).
The structured data I see in the header of your pages doesn't come from HikaShop or any plugin we developed so far.
So I don't know how you have that structured data there, but it's not something we can help with.