How to update HikaMarket Manually

-- HikaShop version -- : 2.3.5
-- HikaMarket version -- : 1.5.1
-- Joomla version -- : 3.3.6
-- PHP version -- : 5.5.17
-- Browser(s) name and version -- : Chrome 40.0.2214.111

I would like to update HikaMarket now, however it does not show in the Auto Update section. So how do I update it myself?

Download it from -> My account -> My subscriptions, and install it like a new extension over the existing version.