How can I restore from paye tools backups?

Hallo there.
I am having serious issues with my application, though I have PAYE tools backups that I have run. I have kept the backups regularly and therefore a recovery will provide indemnity to my system. What I do not know is how to restore from PAYE tools backups. Can someone please tell me how I can restore using the backups step by step? Thank you so very much.
