Hi,
I don't understand the reference to HikaMarket vendor, but the best solution for you will be to add some Javascript in order to unselect the radio.
I could be possible to do such thing by modifying the HikaShop core but it is not something recommended because after that, you couldn't update HikaShop without loosing your modification.
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.