Oracle has assigned a bug number to this issue, but no release date has been assigned to a fix. The following is not a public bug.
Bug 25429167 : EPMAUTOMATE NO LONGER PROPERLY REMOVES OLD VERSION.
When you update EPM Automate, validate the install worked by running EPM Automate and checking the version number.
The version should generally reflect the date of download, if you download this from Oracle’s website. The version above signifies a release of December, 2017 (17.12).
If the version doesn’t change and shows a prior install version date, go to Control Panel, select Programs, and Uninstall a Program. Find EPM Automate and uninstall it. Once this is completed, install the newest version from Oracle’s website and you should be good to go.