ResoPlate is two physically modeled plug-ins: ResoPlate Reverb, a plate reverb, and ResoPlate Instrument, a playable sheet of metal. This installer puts them where your DAW looks for plug-ins, so there is nothing to copy by hand.
It installs:
You can turn any of these off on the Installation Type screen. Updating from a version you copied in by hand? Delete the old ResoPlate files from your user Library (~/Library/Audio/Plug-Ins/Components and ~/Library/Audio/Plug-Ins/VST3) so your DAW only sees this one.