Hi,
Well it's mostly the same has before.
The main change is that before the HikaShop options of the module were accessible via the Display>Content modules menu of HikaShop, but now, they are under the HikaShop options tab when you normally edit the module in Joomla.
The other change is that instead of having a "number of items" and "number of columns" fields, you have the table cells system.
But it's the same logic: you select 3 column and 7 rows and that will give 21 products to be displayed in the carousel, and then you set the "elements per slide" setting to 3, like before in order to only have 3 products per slide.
The rest of the settings are the same as before.