Hi,
There is an option in HikaShop, named "URL where you will be redirected when the cart is empty".
It allows you to specify a URL when the cart is empty. It requires a relative url (without the domain name) or an absolute one (starting with "http://").
By empty this option, HikaShop will redirect the user to the homepage. I think that it's what you want to do.
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.