Hello,
Sorry to hear you are having issues. Fences 5 should have install over those older versions while installing. However please try purge and reinstall steps as mention here : [Link]. Just make sure to redownload the latest Fences 5 version from your account page. Reboot after the purge. Reinstall and reboot again after the installation. Retest and report back here.
Note: Purge should not delete off your saved settings.
Thank you,
Basj,
Stardock Community Assistant.