Go to your member area on yithemes.com.Missing Attachment
Go to "Licenses & Downloads" and click on the "Download plugin" button next to the plugin you want to download.Missing Attachment
Go to Safari Preferences > General.
Scroll down to the bottom and uncheck the Open safe files after downloading box.
Now, you can download the plugin once again and you will be able to get a .zip file to upload into your WordPress dashboard > Plugins page.