Open SetupCapsule and choose Protect this PC. After the capsule is created, keep a safe copy on a USB drive, another drive, or a cloud-synced folder.
No. The important item is the .capsule file. After a fresh Windows install, reinstall SetupCapsule from the Microsoft Store or official website, then open the capsule.
No, not by default.
Your capsule exists, but the only known copy is still on the same PC/system drive. Make an external safe copy so a Windows or drive failure cannot take the capsule with it.
A public support email will be added before launch.