Hi,
Please check your HikaShop menu configuration ("Display > Content menus").
There is an option in "Parameters for products" called "Link to the product page".
Otherwise, in the general HikaShop configuration, tab "Display" there is the same option in the fieldset "Default parameters for products".
Regards,
Jerome - Obsidev.com
HikaMarket & HikaSerial developer / HikaShop core dev team.
Also helping the HikaShop support team when having some time or couldn't sleep.
By the way, do not send me private message, use the "contact us" form instead.