Hi,
You have to login with the account who have bought the license and go into the "Your subscriptions" section in the website.
At this moment you would be able to configure the url of your website. By specifying this URL (your website), HikaShop would find the license and your website would be able to use the automatic updater.
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.