I'd propose to put it in your normal VST-folder. If you don't have one, create one and place all your VSTs (and their subfolders, if any) there. In Reaper go to "Options -> Preferences -> Plug-ins -> VST" and below "VST plug-in paths..." enter the full path to your VST-folder or click "Add" and browse to it. Then click on "Clear cache and rescan directory". HTH -Data