Cannot Install Azure AD Connect

All,

I am attempting to install AD Connect on my domain controller. Connect was previously running on this server, but it was uninstalled and installed on different member server.

Now, the member server is being retired and and I need to reinstall on the DC. When I run the Azure AD Connect installer, I only see options for "Repair" or "Remove". The "Change" button is greyed out.

I've used both options several times but neither of them produce a working version of AD Connect.

I've followed 2 different articles for manually removing all components of the software's previous install, but I still get the same two options when I run the installer.

If anyone has any tips I would appreciate it.