JOOMLA
Install Securitycheck Pro Control Center is easy. You only have to go to Extension Manager, select Install and browse to your Securitycheck Pro Control Center zipped file:

There are other methods to install extensions; you can find them at this url
Push Upload&Install buttom. You'll get a screen with the result of the installation:

WORDPRESS
To install Securitycheck Pro Control Center for WordPress, go to Plugins → Add Plugin in the admin area, click the upload button next to the page title and select the plugin's zip file:

Once you have selected the file, click the Install Now button. WordPress will upload the plugin file from your computer and install it automatically.
When the installation finishes, click the Activate Plugin button (or Network Activate on multisites) to start using the plugin.