Hello,
You should refer here for Fences 5 change log: https://www.stardock.com/products/fences/history and reading through I notice this, while on v4.17
- Improvements to startup performance
What you can do to verify, is use Fences 5 free 30 days trial and see if it is working for you.
Thank you.
Basj,
Stardock Community Assistant.