The first time I installed Endpoint, Proactive Threat was not installed (although I thought it was checked). Since then, I re-read one of the documents that says to run the vcredist_x64.exe installation first, then the setup.exe.
Not sure what happened, but without Endpoint installed, I reran the uninstallation and installation of Authentec one last time and it actually worked, so I was able to configure the software for my fingerprint properly. Then, I ran vcredist_x64.exe and setup.exe. Now, the Endpoint client shows AV and AS protection and Proactive Threat Protection installed, On, and No problems detected, and the fingerprint software still functions.
What bad things happen with Proactive Threat Protection on x64? Why is it even a choice if it doesn't work and is not supported?