Hey Jay:
I'm not a Pluto wiz, my 0.27 installation wasn't fully funtional but I had different issues, you say you installed it correctly but also says errors unpacking?? Sound like the installation wasn't OK, when you install correctly Pluto the only thing remaining is to add devices (MD, remotes, Orbiters,etc)
To me it looks like a corrupted installaton or download, I would retry the installation or create a new one in "my pluto" and then burn it again
Sorry I couldn't be more helpful