Yes. There is a 30-day free trial to CleverFox Backup, no credit card required. The free trial is a fully functional version of the service and is exactly the same that you get when you purchase.
Yes, you can change or cancel subscription plans at anytime. Plan changes can be prorated or take effect at the next billing cycle. Cancellations take effect at the end of the billing cycle.
CleverFox Backup is installed as a background service, no user action required. Configuration (what to back up, how often and when to back up) is done using a web-based management system.
Data backed up to CleverFox Backup is compressed and transmitted over a SSL connection to a secure data center in the US where it is stored using AES-256 encryption.