Plugin request Joomla 3.x in order to operate. Old version can also work with Joomla 2.5.  Because of security reasons ensure you are using the latest version of CMS. The latest stable version of extension can be downloaded from here: http://www.joomshaper.com/joomla-extensions/sp-comments

The package you will download contains everything to get SP Comment up and running. It does not need to be uncompressed. Once you have downloaded the package, go into the Joomla Administrator and:

From Joomla back-end:

• Select from the top menu: Extensions -> Extension Manager -> Install
• Click on Upload Package File Choose File button
• Select the plg_content_spcomments_j3.zip that you just downloaded from your local drive.
• Click the Upload & Install button.