How to update HikaShop
Select Components > HikaShop from the top menu of your website's Control Panel.
Then select the Documentation > Update / About to see if a new update is available (see example below).
If YES then you will need to visit the developer's website (using the link provided) to download the latest update.
And perform a MANUAL update.
Click on the image to view a larger version.
Perform a FULL backup of your website (database & files) before you update Joomla! extensions.
Extension updates can potentially break your website.