Log in as an administrator and go to Plugins > Add New. You can install the plugin by uploading the plugin file or searching it in the WordPress plugins directory.
a) Click the Upload Plugin button and choose the plugin’s zip file, click the Install Now button.
b) Or, type Widgets in the search field and click Search Plugins, locate the Widgets Control plugin by itthinx and install it by clicking Install Now.
Now activate the plugin to have the widget placement features available.
You can also install the plugin via FTP, see Manual Plugin Installation
Automatic Cache Clearing