Hi @Bobby Henderson,
I found msi's for Web Deploy versions 3.6 and 4.0, but both installers fail with a message that a newer version of Web Deploy is installed.
Web Deploy 4 is provided as part of Visual Studio, it conflicts with the installation of Web Deploy 3.6, which means you need to uninstall the existing one before installing the another. Based on your description, you can check if it shows in windows Apps & Features, like this:
I ran into the same error message as you, because I originally had Web Deploy 4 installed, I uninstalled it in this setting, and finished installing version 3.6. You can have a try and check if it works for you.
Best regards,
Xudong Peng
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