How to make Theme and plugins update
Download here http://themeforest.net/downloads the latest version
go Appearance-->themes, activate any theme, remove Flatastic (Revija, Shopme or any another my theme) theme. If you need to update all our plugins. Go to Plugins, deactivate them, and Uninstall. Install new flatastic.zip (or another theme), activate. After go to Flatastic (Revija, Shopme or any another my theme) settings and click Save settings. After go to Appearance-->Install Plugins and install new plugin's versions
Also you have option to adjust autoupdates