Question : How can i take the update ?
1. If you dont make any customization on any files or follow the customization rules described here http://support.dbcinfotech.net/index.php/en/show/faqdetail/11/How-to-customize-my-copy-- then Just upload the zip from admin panel > upload and click "upload & install button"
or if you want to install the update manually
1. Replace ROOT/application directory with application directory [Merge and replace]
2. Replace ROOT/dbc_config directory with dbc_config directory [Merge and replace]
3. Replace ROOT/system directory with system directory [Merge and replace]
NB: Please create a sql backup before update. Also if any custom work is done on you script then please
replace files carefully so that your custom works do not loose. If possible take a file backup also.
The update pack contains css files , view files , language files. So please take backup before doing anything.
If you don't follow the rules then the best way will be installing the update on a seperate subdomain and then bring those changes to the new copy.