Information on Windows 10 Startup delay, and a hack that might help you
I have not tried the Registry hack you recommended yet, I dont think I should have to do this to get this paid app to work
As mentioned in that link, Windows 10 intentionally delay other programs from startup for 10 seconds, hence the slow start up for fences that you observed. I suggest you that link if you wish to see Fences startup faster.
Actually Fences itself load up respectfully fast :
Stardock Community Assistant.