Sure, you can cancel any time and reactivate anytime. It's super simple. Open the Registration window in Path Finder and login to your account using your email.
The dashboard will appear showing your account and subscription info. There is a menu item to cancel your subscription in the menu on the top right of the subscription card.
You will be refunded a prorated amount. For example, if it's been 6 months and you paid for a year, you will get half of what you paid refunded.