Hi,
With the Business edition of HikaShop, and if you have a recent version of HikaShop, you can go in the menu System>Configuration (the configuration page of HikaShop), and under the "access level" tab, you can disable the documentation/configuration area for all or some of the user groups so that you can have some users who see the options and some others who don't.
Even if you remove the update link from there, the Joomla updater will still notify the admin when a new version of HikaShop is available and the update will be possible via the Joomla udpater.