Hi,
I don't see how this has anything to do with the update of HikaShop.
First, the product layout looks like the default one of HikaShop for the product page, so updating wouldn't change it.
Second, if you modify the product layout via the menu Display>Views like we recommend, the layout changes are stored as template overrides and thus you don't loose them when you update.
Third, the only issue I see is the dropdowns which takes too much width on your product page:
take.ms/WV1WY
And that can easily be solved with basic CSS code you can add in your Joomla template:
#hikashop_product_options select{
width: 260px;
}