Movign Halion software from one HD to another

Can anyone explain to me the best way to move Halion4 downloaded accidentally to my computer’s internal hard-drive to moving it to an external HD? I have El Capitan 10.11.5 operating system and my hard drive is a 1TB seagate. I would actually like to re-download Halion onto my HD and just delete it off my my computer but I’m getting this error message saying I need the latest OS X 10.5 but I have the most up to date operating system right now (see attached print screen) I can’t seem to find the instrumental/sample files to delete off of my computer either, I’m not sure of the right way to delete halion from my computer. thank you!


Use Steinberg Applications Installer Tool, please, to install HALion on your Mac OS X.