You can reactivate your subscription by using the following steps.
- Log into https://secure.cheqbook.com
- Click on your email address in the upper right to see the user menu.
- Select "Subscription" from the user menu.
- Select the plan you want to activate.
- Click on "Reactivate Subscription" button.
After reactivating your subscription, make sure you unarchive your companies so you can start working.