Upgrade from Essential to Business not working

-- url of the page with the problem -- : mirrorsailing.org
-- HikaShop version -- : 2.3.1
-- Joomla version -- : 3.3.1
-- PHP version -- : 5.4.28
-- Browser(s) name and version -- : Firefox
-- Error-message(debug-mod must be tuned on) -- : Error_message

Hello, I purchased Essentials, installed it, added a few categories and product and then realized I needed features in Business. I purchased Business and tried installing it via Joomla's Extention Manager in the usual way, the installation hangs. When I log back into my site, it shows that I still have essentials installed.

How do I upgrade from Essentials to Business?

**Edit**
Initially, I installed the zip file, when I tried upgrading to Business I installed the tarball, or tried to at least. Installing the Business zip worked without any problems.

Regards

Neil

Hello

I am now seeing this error, JLIB_HTML_RESULTS_OF, below the Display # on all pages that show the Display #, see 2015worlds.mirrorsailing.org/index.php/s...ory/14-accommodation .

I have read through this topic, www.hikashop.com/forum/install-update/86...to-2-2-3.html#141079 . I am only using one language, en-GB and the translation key exists in en-GB/en-GB.lib_joomla.ini:JLIB_HTML_RESULTS_OF="Results %s - %s of %s".

I treid replacing the code, as per your post in the above topic, this did not resolve my issue.

I don't have any special components or plugins installed.

With Language debug mode on, I see: ??JLIB_HTML_RESULTS_OF??

Regards

Neil