I’m stuck at the same point. I purchased GP Premium as well and sorry, I can’t “fix” it. How can I Install Plugins? The file that came with the purchase doesn’t have any zipfiles in it.
What did I miss? I’m lost.
—- Note for Mac users: If your download appears as an ordinary folder instead of a zip file, go to “Safari Preferences > General” and uncheck “Open ‘safe’ files after downloading”. Then the download will remain a zip file and not be unpacked. —-