I just purchased your Alpine PT template for Joomla. I am using Joomla version 3.3.6. I installed it just a few minutes ago. When I try to install your template I get the error below:
1242 Subquery returns more than 1 row SQL=INSERT INTO 'jos_update_sites_extensions' ('update_site_id') VALUES ((SELECT'update_site_id' FROM 'jos_update_sites' WHERE 'name'='Joomla! Update Component Update Site'), (SELECT 'extension_id' FROM 'jos_extensions' WHERE 'name'='com_joomlaupdate'));

At this point, the front page is still up. However, now my Joomla admin page is gone and the error I get I try to open the administrator page is:

"Fatal error: JApplication::getUserState(): The script tried to execute a method or access a property of an incomplete object. Please ensure that the class definition "Joomla\Registry\Registry" of the object you are trying to operate on was loaded _before_ unserialize() gets called or provide a __autoload() function to load the class definition in /home/hakan/public_html/libraries/legacy/application/application.php on line 528"

I will have to reinstall Joomla which will not be a problem but please get back to me with a solution that will not repeat.

Thanks,

Hakan Kilic