Installing using FTP

You can upload the plugin folder directly to your web hosting.

Unpack the downloaded .zip file.
Start your FTP client and navigate to the plugins folder on your web hosting.
Upload the unpacked folder to the plugins folder.
Note! - After unpacking the .zip plugin file, a new directory can be created (when using the built-in windows unpacker or winrar). You must upload the nested folder that contains .php file(s) (Not the folder that only has a single child folder).
Go to Plugins - Installed Plugins
Find the uploaded plugin and click Activate