My webhost has sent me the new Enfold theme, but where can I attach the zip file?

Sorry, this guide on how to update to new Enfold is from 2013. It doesnt look like that anymore. I have tried via FTP as per above link you sent, it doesn’t work. When you go back to WordPress after having “pulled” the Enfold theme from Local site (my desktop) to Remote site (WordPress) as showed, it still doesn’t give me the option to update anywhere.

Thanks,
Anna