If you already downloaded the latest installation.exe file, go ahead and launch it. It will install the .dll plugin file in C:\Program Files\Steinberg\VstPlugins. (FYI: the main program and support files are in C:\Program Files\Akai Pro\MPC Beats).
Then open Studio One and go to the Studio One pull down menu and select Options-Locations-VST Plug-ins tab and make sure C:\Program Files\Steinberg\VstPlugins is in the scan list. You can get it by selecting the add button. As you probably already know MPC Beats can be used as a standalone program as well as a DAW plugin
