Hello Julia,

Thank you for getting in touch with us. My name is Attila and I'm happy to assist you today. I appreciate your patience while we've been working towards your ticket.

You have to decompress the archive that you downloaded from CodeCanyon and use the installable zip inside it.

If you're new to WordPress and plugins, you can find detailed installation instructions in the plugin documentation that will guide you through the process, please refer to the following URL: https://layerslider.kreaturamedia.com/documentation/#installation