IMPORTANT!!!
Automatic part of upgade is completed. Please do the following to complete upgrade process:

Clean /cache/, /cache_public/ and /tmp/ folders via FTP or SSH, leave only .htaccess file there if one exists
Recompile language files for all modules from admin panel -> Tools -> Modules
Recompile system language file from admin panel -> Settings -> Languages Settings
Recompile Orca Forum language file from admin panel -> Modules -> Orca Forum -> Manage Forum

Set permissions for the following files:

chmod -v 666 ./flash/modules/chat/xml/config.xml

Flash A/V Chat settings were reset, if you changed it before you need to update it again in Dolphin admin panel -> Flash Apps -> Chat -> Settings
Remove /upgrade/ directory

Change the following lines in inc/header.inc.php file:

$site['ver']               = '7.0';
$site['build']             = '4';

to the following:

$site['ver']               = '7.0';
$site['build']             = '5';