Please do the 30 days trial and see if it work as you wish. And yes, if you have done the trial and wish to revert back to Fences 4, you can uninstall Fences 6, reboot the system, download Fences 4 from your account download page. Install it, reboot again after that. You should be back with Fences 4 after reboot.
Thank you,
Basj,
Stardock Community Assistant