Thanks for updating the thread.
Sure, let us know how it goes.
When you download the package from Apex, it will download the installable X Theme file. So you can just upload and install the theme directly.
At the same time when you download files from Envato, usually I have seen users downloading the complete X package that contains the extensions package and other files along with installable X Theme package. So you will have to extract the downloaded file before uploading on to server.
So, if the requirement is to install theme then in Envato ideally you should select Installable WordPress file only.
For more information, please take a look at following resource: