I had a major crash on my computer and when I tried to reinstall AutoCAD (2018) I get a message that says it's already installed. I tried using the uninstall tool and it doesn't find anything, how I find what parts of AutoCAD are installed and get rid of them? I've already gone into the directory Program Files, Program Files (x86), and ProgramData and removed all the files there after the uninstall or didn't work but the system still thinks AutoCAD 2018 is in the system? Any idea how I can get rid of it so I can reinstall?