Hi,
If you aren't using variants / characteristics, then just run this MySQL query via your PHPMyAdmin:
UPDATE joomla_hikashop_product SET product_type='main' WHERE product_type='variant';
It will force all the entries in the hikashop_product table to be with the type "main" and not "variant".
Also, it's not possible you don't have the hikashop_product table. Please look again. You have to have it.
Note that at the top of the list of tables on the left explorer of PHPMyAdmin, you have a dropdown with the current page. If you have a lot of tables (and any Joomla website has a lot of tables), you'll be able to switch from the first page of tables to the next pages with this dropdown. From what I can see on your screenshot, it seems that you didn't look at the next pages of tables.
Also, if you click on the name of the database on the left explorer, you'll see all the tables on the right side.