Get that these are .pkg files but where do I unzip them for wins systems?

Those are the Mac installers. The ones you want will be typical EXEs. Try toggling the OS selection before downloading.

It was set to windows and downloaded mac files. Set it to mac and it downloaded wins files. Because I couldn't leave well enough alone, tried it with other browser and same thing. Cleared the junk - same issues. Works but but it bugged me.
So I reinstalled them all and now the button works as intended. That'll teach me to play around with the scripts on my browser for fun.
The DLCs installed by the way. Thank you.