In order to manage your subscription you can always go to Settings→ Billing

In the tab you'll find:
- Pricing details (you can check your pricing details page)
- Subscription managing details ( ‘To see your billing history open FastSpring Payment Portal’→ Manage→ Update Payment Method\Modify/ ❌ How to Cancel Subscription)
- Information on adding users 👥 How To Add More Users To Your Subscription
- Other detail of your subscription plan (number of pages/ versions history limit/ maximal number of users and import and attachments limit)