Installing Corpo Toolkit

Hi, I use SFTP and this makes it difficult for WordPress to install plugins sometimes – so I must install plugins through an SFTP client like FileZilla. I need to find another way to install the Corpo Tool Kit (I can’t do it from in WordPress)

I found the files in the functions/plugins folder of the theme. I unzipped them on my computer and went to upload the folder to the wp-content/plugins folder as I would any other Plugin, but for some reason the Corpo Tool Kit plugin doesn’t appear in the plugins list in WordPress after, so I can’t activate or use it.

Does anyone know a way to install the Corpo Tool Kit plugin without going to Appearance > Install Plugins in WordPress?

Thanks,
Adam